Last night, Eminem returned to Chicago's Lollapalooza for the first time since he headlined in 2011. Closing out Friday's music, he delivered a hit-filled setlist, complete with two surprise guests: Rihanna and Royce da 5'9".

Em's "Monster" tourmate joined him onstage for "Love The Way You Lie," "The Monster" and "Stan," and his "Bad Meets Evil" collaborator helped out on "Fast Lane." Watch performance videos of all of those tracks below.

Onstage, Em rocked a vintage LL Cool JBigger And Deffer t-shirt, and he was later thanked by RiRi on Twitter:

[via, via]