Eminem and Rihanna Perform 'Stan' at Lollapalooza

Lollapalooza kicked off with performances from Iggy Azalea, Lorde, Arctic Monkeys, and Eminem, who closed out day 1 of the three-day festival in Chicago on Friday.

Wearing grey jersey shorts and a T-shirt printed with LL Cool J’s Bigger and Deffer album cover, the hip-hop superstar returned to Lolla for the first time since 2011, performing a 90-minute set on the Samsung Galaxy stage at Grant Park.

In addition to ripping through hits including “My Name Is,” “Not Afraid,” and “The Real Slim Shady,” Em welcomed special guest Rihanna. The powerhouse duo gave fans a preview of their upcoming “Monster Tour” by performing their No. 1 collaborations “Love the Way You Lie” and “The Monster.”

But the highlight was when Rihanna filled in for Dido on Em’s 2000 single “Stan,” while the crowd waved their hands and sang along.

“Thank you @Eminem and Chicago for letting me share this moment with you at #Lollapalooza,” tweeted RiRi.

The music superstars will kick off their co-headlining tour at the Rose Bowl in Pasadena, Calif. on Thursday, August 8. The three-city stadium trek will also play Detroit’s Comerica Park and New Jersey’s MetLife Stadium.