Lily Allen has admitted that she feels so unattractive that she is considering plastic surgery.

The 'LDN' singer posted on her MySpace page to confess that she has researched gastric bypass surgery and laser liposuction.

She also revealed that she feels insecure about the success of Amy Winehouse, who beat her to the Best British Female Artist gong at this year's Brit Awards, by naming her post "Fat, ugly and s**tter than Winehouse."

She wrote: "I used to pride myself on being strong-minded and not being some stupid girl obsessed with the way I look. I felt like it didn't matter if I was a bit chubby 'cause I'm not a model, I'm a singer .

"I'm afraid I am not strong and have fallen victim to the evil machine. I write to you in a sea of tears from my hotel bed in Seattle. I have spent the past hour researching gastric bypass surgery and laser liposuction."