Attendees watch the fireworks during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Bruno Mars performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees are silhouetted at night against the wedding ceremony area during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

The ferris wheel is seen lit up at night during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Carlinhos de Jesus leads a line dance during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Michael Moore, right, waits for his marriage ceremony to begin during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. Minister Brendan Paul, dressed as Elvis, stands left. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees take in the views from the VIP entrance walkway at the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Dancers and performers entertain the crowd during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees fly down the zip line during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A security guard stands in the shade during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Kalani Ahmad, left, performs a trick with the help of audience member Yu Sawada during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees walk the festival grounds during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees walk the festival grounds during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Four-year-old Lexi Jensen of Aspen, Colo., watches a wedding ceremony during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees raise their fists in the air as Mayer Hawthorne performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People arrive at the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Mabel Tavares and Michael Moore, both of Las Vegas, kiss during their wedding ceremony at the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People at an information booth use an umbrella to block the sun during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A dancer with Carlinhos de Jesus performs during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees line up for their turn with a fortune teller during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People out from the VIP area during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Shadows are cast against a wall as attendees walk the festival grounds during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Empire of the Sun performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Empire of the Sun performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Luke Steele of Empire of the Sun, third from left, performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A member of Bossacucanova performs in the crowd during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees relax at the main stage before Empire of the Sun performs during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Empire of the Sun performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees dance as Bossacucanova performs at the Rock Street Brazil stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A video crew prepares to shoot on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Luke Steele of Empire of the Sun performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Empire of the Sun performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees stand in a VIP area as the sun sets during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A member of Bossacucanova performs in the crowd during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees dance around at the EDM stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees dance around at the EDM stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Band members set up before performing with John Legend on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans wave light sticks before John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

The main stage lights up as John Legend performs during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees relax on the grass before John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees take photos near the VIP area entrance during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans watch as John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans watch as John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

John Legend performs on the main stage during the Rock in Rio USA music festival in Las Vegas on Saturday, May 16, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto