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Eminem and Rihanna have been added to the lineup for this weekend's MTV Movie Awards. 

The stars are set to perform their hit "The Monster" during the awards show, marking their first-ever televised performance of the song. 

Both have been asked to perform before.  Rihanna sang with Jay Z back in 2007, and Eminem was a guest in 2009.  Their MTV appearance will be a preview of their upcoming joint tour, also named for the song.  The trek will cover six dates in Pasadena, New York and Detroit starting on August 7th.  

The MTV Movie Awards are set to air live from the Nokia Theater in Los Angeles on Sunday night with host Conan O'Brien.  Ellie Goulding and Zedd will be performing as well.  

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