Lily Allen has something to “smile” about.

Claiming she’s as big of a bad-ass lush as Amy Winehouse is a losing battle (one that she shouldn’t mind losing, really), she’s also losing something else: weight!

The songstress has been flaunting a newly svelte body all over Paris this week during fashion week. So how did she drop from a size 12 to an 8?

Surprisingly, not hard drugs, bulimia or starvation. Hypnosis.

Allen slimmed down with the help of Susan Hepburn, a known quack psychotherapist who (for $600 an hour) implants messages into clients’ minds, reminding them to stop eating if full.

She’s good at what she does, too. Take a look at Keira Knightley, Kate Bosworth, Mischa Barton and Nicole Richie (before she got knocked up, that is).

According to the Daily Mail, Hepburn also teaches clients to associate healthy activities, such as working out in the gym, with happiness. We would love to see this doctor join the Grey’s Anatomy cast.

“After the hypnotism, I want to go to the gym every day, otherwise I feel really bad,” Allen, 22, said. “I just want to get more toned and healthy. I’m really good about everything at the moment. I’ve never been happier.”

Lily Allen‘s self-confidence certainly has increased since last spring. In May, the “Smile” singer posted a melancholy blog post on her MySpace page in which she blogged about her body image issues.

“I used to pride myself on being strong minded and not being just some stupid girl obsessed with the way I look,” Lily Allen wrote. “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 liposuction.”

Maybe someone should try to hypnotize that wreck Britney Spears into caring about her kids and laying off the booze once in awhile. Just an idea.

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