Grammys this weekend: Which performance are you excited about?

Somebody had better make sure that Rihanna — a performer at Sunday's Grammy Awards — gets this memo. CBS is warning performers that buttocks and female breasts must be "adequately covered" on music's biggest night. Yikes . . . that pretty much rules out everything Rihanna has ever worn! 

Despite her taste in attire (and men), we're psyched to see RiRi performing with Bruno Mars and Sting at Sunday's show. We're also looking forward to Justin Timberlake's "comeback" performance — it's been a while! 

SODAHEAD SLIDESHOW: See the most exciting Grammy performers.

Taylor Swift will be doing her country cutie thing — will Kanye West come out and ruin it all? 

You'll also get to check out nominees including The Lumineers, The Black Keys and Mumford & Sons. 

PHOTOS: See the latest celebrity pictures to hit the Internet.

From Taylor to Frank Ocean, let us know: Which performer will rock the Grammys?