Rihanna at the MTV Movie Awards

Rihanna performed at the MTV Music Awards, doing a duet with Eminem. The pair sang The Monster for the first time ever on-stage. Earlier in the night, Rihanna walked the red carpet in a strapless white bustier with a silk robe.

Eminem and Rihanna first sang together on 2010’s “Love the Way You Lie,” from Eminem’s Recovery. The song topped the charts in more than 20 countries and was the best-selling song of each of their careers. They teamed up for “Love the Way You Lie (Part II),” on Rihanna’s Loud and on “Numb,” from Rihanna’s Unapologetic. They’ve performed together a handful of times, appearing as surprise guests during each other sets, the 2010 VMAs, and the 2011 Grammy Awards.

They’re now going on a stadium tour together for their Monster Tour, which kicks off on August 7 in Los Angeles.