CHICAGO — Nearly 150 acts turned up to Lollapalooza over the weekend to perform for tens of thousands of concertgoers at the sold-out festival. While the artists' main focus was the fans, many were also geeking out over performances they were excited to see at Grant Park.

"Lollapalooza is just so much fun. There's so many iconic people performing so it's a good time," Rita Ora told MTV News during her Rolling Stone showcase Saturday afternoon. "I cannot wait to see Red Hot Chili Peppers, Frank Ocean ... and that's it for right now, there's so many I can't remember. ... I don't know if I've missed Little Dragon, I love Little Dragon."

Indie-pop singer Dev was also enthusiastic about the 2012 lineup. "Everybody this year is really rad," she said.

Her act of choice? With so many talented performers scheduled to play, the bleached-blond singer couldn't pick just one.

"When I first found out I was going to be part of this festival and I looked at the lineup, I couldn't believe, the Red Hot Chili Peppers, Jack White, Black Sabbath, Santigold, Florence and the Machine, Frank Ocean ... Channel Orange is awesome, f---ing killed it," Dev explained. "Congratulations [to everyone] for keeping the festival alive."

Although pop-rock trio Fun. almost missed their performance due to inclement weather, there was nothing stopping the threesome from seeing some of their faves perform.

"I love LP, I think 'Into the Wild' is one of the best songs of the year," guitarist Jack Antonoff said.

"I was thinking the Red Hot Chili Peppers because I like to think of the drummer, Chad Smith, as an older Jack," Fun. frontman Nate Ruess added.

Although Illinois native Haley Reinhart grew up right outside of Chicago, this was not only the "American Idol" alum's first time performing at the festival but attending it as well.

"There's so many awesome people, I'm really going to try to see Black Sabbath, of course, Black Keys, the Shins," Reinhart told MTV News after taking the stage. "I don't know if I missed them or not already, but there's plenty of people I'm dying to see."