Fireworks go off from the main stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Taylor Swift performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Ed Sheeran performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans wave around light sticks before Ed Sheeran performs at the main stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Charlie XCX performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Aaron Shaw of celtic band Wicket Tinkers, center, performs during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Seven-year-old Jenna Tan, sitting on the shoulders of her dad, Apollo, waves her hands as Tove Lo performs on the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans cheer for Tove Lo as she performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees wait in line for an airbrush tattoo during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Veronica Jones tap dances at the Rock Street USA stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees arrive at the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees line up at a top up station to add money to their RFID wristbands during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A young fan looks to catch a glimpse as Charlie XCX walks onto the stage at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans watch Tove Lo as she performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees walk through the crowd as Tove Lo performs on the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Members of celtic band Wicked Tinkers perform during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

A woman on stilts walks by people offering samples at the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People walk around the festival grounds during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Glayton Reis, right, of Pennsylvania, tries on sunglasses with the help of Lucas Rocha Santos, left, at the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Stone The Beetles perform at the Rock Street UK stage the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People take photos of celtic band Wicked Tinkers as they perform at the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees take photos near the entrance of the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees relax at the festival grounds during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

An empty beer can sits on the ground during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans watch as Charlie XCX performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Fans wait for Charlie XCX to perform at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Attendees take a break during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

Jessie J performs at the Mercedes-Benz Evolution stage during the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto

People take selfies as they arrive at the Rock in Rio USA music festival in Las Vegas on Friday, May 15, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto