The Grammys, known for its over-the-top  provocative performances by the world's top musicians, and home to some of the  sexiest red-carpet dresses during awards season, seems to be smarting  up.

Yesterday CBS sent a Wardrobe Advisory to all  attendees and performers in advance of the 55th Annual Grammys, which will be  broadcast this Sunday.

Asking that all talent appearing on camera  'adhere to Network policy concerning wardrobe,' the email stipulated that  'buttocks and female breasts [must be] adequately covered.'

The email which was leaked to Deadline  and came attached with an image of Pink performing in a barely-there costume at  the 2010 Grammys, added: 'Thong type costumes are problematic.

Check out some Grammy Award outfits from the past HERE