This is the main stage for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015 at the intersection of Sahara Avenue and the Strip. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Julio Rodriguez from Parnell Electric installs lighting under a step in the VIP area at the MGM Resorts Festival Grounds in preparation for the upcoming Rock in Rio USA music festival Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Media and invited guests take a look around the VIP tent for Rock in Rio USA at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Deserts to be served in the VIP tent for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Rock in Rio Vice President Roberta Medina speaks about the upcoming music festival in the VIP tent at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Chef Stephanie Gelberd shows off some of the food that will be served in the VIP tent at the Rock in Rio USA on the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Workers assemble a stage for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015 at the intersection of Sahara Avenue and the Strip. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Workers are seen on the main stage for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Media and invited guests get a preview of the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Riggers work on the main stage for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

A construction worker heads into one of the merchandise booths for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015 at the intersection of Sahara Avenue and the Strip. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

Designer Kiki Gomez, right, and assistant Keith Lane Brooks decorate the Corona booth for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ

The last vestiges of the Adventuredome theme park ride are covered in new vinyl for the Rock in Rio USA music festival at the MGM Resorts Festival Grounds Friday, April 26, 2015. Rock in Rio, one of the largest music festivals in the world, was started in 1985 in Brazil and the Las Vegas edition is its first in the United States. (Sam Morris/Las Vegas Review-Journal) Follow Sam Morris on Twitter @sammorrisRJ