CBS has a simple request for the performers and presenters at the 55^th Annual Grammy Awards: no buttocks and no female breasts.

The network sent out an email to performers attending the 2013 Grammys, held this Sunday in Los Angeles, asking them to please cover up.

"Please be sure that buttocks and female breasts are adequately covered," read the email, which was leaked to Deadline. "Thong type costumes are problematic. Please avoid exposing bare fleshy under curves of the buttocks and buttock crack. Bare sides or under curvature of the breasts is also problematic."

The email, which featured the subject header "55th GRAMMYS: Standard And Practice Wardrobe Advisory," also had instructions barring "any organized cause visibly spelled out on talent's wardrobe be avoided. This would include lapel pins or any other form of accessory."

The email had artist Pink tickled, well, pink, as a photo attached to the email featured the artist hanging upside down in a previous Grammy performance, buttocks and breast curvatures clearly exposed.

"Hahaha love that they used my pic," Pink tweeted.

The singer wasn't the only one mocking the ban on Twitter.

Comedian Denis Leary tweeted:

"CBS is banning 'breasts, buttocks and buttock crack' from the Grammys. Which are the three main reasons I tune in."

"The sideboob and buttcrack ban at the Grammys is because of Cee Lo Green," wrote Stephen Amiri.

Twitter user Ashley Buccille is calling for a female protest in response o the CBS Grammy wardrobe rules.

"No side boob at the Grammys? I hope every woman there just shows up with her tits out. Not sheer coverage, or a low neckline, JUST BOOBS."