The singer appeared on The Today Show to announce the inaugural iHeartRadio Music Festival in Vegas in September.
'It's going to be me and Lady Gaga, Alicia Keys, Coldplay, Steven Tyler, Carrie Underwood, Black Eyed Peas - so many people. It's going to be an amazing concert. It's pretty exciting - I'm glad to be doing it.'
Lopez also said she will soon make an announcement on whether or not she is returning to American Idol.
'I loved working on American Idol, I loved doing it - I have no announcement to make as of this moment, but I promise you guys will be the first to get it,' she said.