Eminem & Rihanna to Perform “Monster” at MTV Movie Awards.

Eminem and Rihanna will perform their #1 duet "Monster" for the first time ever on TV this Sunday at the MTV Movie Awards, according to the Hollywood Reporter.

Both artists have previously performed on the show, but not together.  Rihanna performed in 2007, and Eminem did the same in 2009.  You may recall that also was the year that a bare-bottomed Sacha Baron Cohen descended from the ceiling and landed on Em, who appeared to be incensed, but the whole thing was later revealed to be staged.

Eminem and Rihanna will kick off their Monster tour August 7 in Pasadena, California.  It'll also visit Detroit and New Jesrey before wrapping up August 23.

The MTV Movie Awards, hosted by Conan O'Brien, will air on Sunday, April 13, at 9 p.m. ET/PT