Last updated at 09:26 15 February 2008

Amy Winehouse is cleaning up her act in more ways than one.

The singer used her trademark black eyeliner to cover up a topless tattoo on her arm when she performed via satellite at the Grammys, it has been revealed.

Producers at the music ceremony, where Amy won five awards last week, were concerned by the graphic nature of one tattoo on her left arm which features a topless woman.

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So Amy, 24, filled in the offending area before she appeared on air.

A source told the Daily Telegraph: "Amy drew a little black bikini top on the large topless femle tattoo on her arm, so as not to offend any of America's puritanical viewers."

After the show, the tattoo is said to have been removed.

Amy, 24, is receiving treatment for substance abuse after being caught on camera apparently using crack cocaine last month.