Eminem and Rihanna

Eminem closed out day 1 of Lollapalooza in Chicago on Friday (August 1), performing from his vast catalog… and got a little help from Rihanna.

Rocking a T-shirt with LL Cool J’s Bigger and Deffer album cover, the rap star performed hits like “My Name Is,” “Not Afraid,” and “The Real Slim Shady,” before welcoming RiRi who assisted with “Love The Way You Lie” and “The Monster.”

One of the highlights was when Rihanna filled in for Dido on Em’s 2000 single “Stan.”