Paula Abdul has admitted that she underwent botox this year, but remains adamant she has never had any other plastic surgery.

The American Idol judge has been the subject of constant rumours claiming she is a cosmetic surgery regular. This week she told OK! magazine that she had only ever tried botox on her forehead, and apart from that she has steered clear of treatment.

"Check behind my ears! I haven't had one ounce of work done," she insisted. "I had (botox) done for the first time six weeks ago in my forehead, and it only worked for about two weeks."

She added a cheeky comment about her Idol colleague Simon Cowell, hinting that he was a botox regular: "Simon doesn't have any wrinkles," she laughed.