AVRIL LAVIGNE was spotted at a party in Caesar’s Palace yesterday dressed like a teenager headed to prom. Does she think she’s still 16-years-old?

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Apparently, she does.

Avril graced the MAGIC clothing convention after-party at Pure Nightclub in a black spaghetti strap cocktail dress with a fluffy, tulle skirt—a tutu, if you will.

Very prom couture, yes?

And then, to make matters worse, Avril decided to pair the dress with tattered black leggings and chunky boots.

AVRIL LAVIGNE was recently spotted getting cozy with ex-husband DERYCK WHIBLEY while vacationing in France, according to the latest celebrity news. Her boyfriend, BRODY JENNER, was nowhere to be found.

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The two were on a boat trip with some friends on the French Riviera, and a bikini-clad Avril was photographed affectionately hugging her ex-hubby, Deryck. The former couple (or maybe not so “former” anymore?) was all smiles as they chatted with each other.

Yes, it’s true—AVRIL LAVIGNE hurled a couple of F-bombs and various other obscenities at the crowd during last night’s Tampa Bay Rays game. After hearing about this bit of celebrity news, we couldn’t help but hurl a bit of sarcasm her way, such as: ‘She’s such a badass, isn’t she?’ and ‘What a classy girl.’

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AVRIL LAVIGNE is a Canadian singer-songwriter, fashion designer, actress, and philanthropist. By the age of 15, Lavigne had appeared on stage with Shania Twain; by 16, she had signed a two-album recording contract with RCA Records worth more than $2 million. In 2002, when she was 17 years old, Lavigne became world famous for her debut album Let Go.

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Brody Jenner shaves an “A” on his hair for Arvil Lavigne! Jenner shows permanent love for Avril Lavigne… OK, semi permanent because hair can grow out and he can decide to not shave another A in his hair…but that tattoo on his arm is permanent!

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More pictures of Brody and Avril after the song…

Avril and Brody got the tattoos a few months ago, but we never saw the pictures. Now we get to see the ink and the razor blade’s work!

Avril Lavigne and Lindsay Lohan got into a fight at Hollywood’s Chateau Marmont last week. Lindsay was doing what she normally does — partying late night, probably with a raging buzz — when she approached Avril‘s table. Avril was flanked by boyfriend Brody Jenner and a few other people and didn’t want Lindsay joining her table.

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more Lavigne and Lohan after the hop…

A spy told Page Six: