Just Fabulous celebrates launch of the Abbey Dawn Collection held at The Viper Room in West Hollywood, California last night.

Abbey Dawn is Avril Lavigne’s clothing line.

Also in attendance is the always classy Taylor Momsen and Dereck Whibley, Avril’s ex-husband. (He is one weird looking dude!)

No sign of Brody Jenner – does that mean they really are split up?

Photos: Fame/Flynet

Kylie Jenner had some hardcore cheerleaders in the front row as she walked her first runway last night for Avril Lavigne’s Abbey Dawn clothing line: Her superstar sisters!

Kim Kardashian, her husband Kris Humphries and sisters Kourtney and Kendall all sat right up front as Kylie made her Fashion Week debut for Avril’s punk clothing line.

The sisters were out of their seats, shouting at 14-year-old Kylie every time she hit the runway, looking proud of their little sis and taking personal photos the entire time.

Also cheering her on: Step-brother Brody Jenner, who also just happens to date designer Avril. What a coincidence, right?

The accolades poured in after the show, with Kim tweeting “She was so fab!” and Kourtney adding “@KylieJenner rocked it walking in Avril’s Abbey Dawn show! So much fun!!!!

Brody commented as well, tweeting “Just saw @KylieJenner walk in the @AbbeyDawn fashion show!.. She looked beautiful and was such a natural. Proud to be her brother ”

Check out all the runway pics here!

Avril Lavigne holds onto her boyfriend Brody Jenner after lunch at La Scalas restaurant in West Hollywood. Avril showed off bright green hair that matches her bright green Hermes handbag.

Photos: Fame

Avril Lavigne unleashes her fourth studio album “Goodbye Lullaby” in NYC at her release party last night.

Kim Kardashian showed up in support of her friend, who’s dating her step-brother, Brody Jenner.

Photos: Fame

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Looks like Avril Levigne may be bringing back a little bit of her old “Skater Boy” style by sporting pink and green hair. She and boyfriend Brody Jenner were spotted arriving in Monte Carlo, Monaco on Feb. 18.

The Canadian rocker was recently in London for a special preview of her upcoming album “Goodbye Lullaby“, which is due to be released on March 8. The album is being released 4 years after her last album, “The Best Damn Thing” was released, Lullaby will be her 4th album.

It’s said this album will include collaborations with Butch Walker and Max Martin and will even have a contribution from ex-husband, Sum 41 front-man Deryck Whibley, whom she divorced in 2009.

She spoke out about her upcoming albums delayed release by saying:

“”This has been a really difficult record for me to create and to release,” she wrote. “Not only is this the most meaningful and special record I have written, it is sincere, honest and close to my heart. But for the first time I experienced a bunch of bureaucratic BS… People do their best work when they are doing what they want, love and is natural for them, not when you are forcing them to be something that they are not.”

I’ve heard her newest single “What the Hell” and actually liked it. It reminds me a lot of her the songs off of her first album, which I was a fan of. If the rest of the new album is as catchy, I’m sure she’ll have a hit. For now I’m sure she’ll be enjoying some fun in the sun with boyfriend Brody Jenner before all of the promoting craziness begins.

Fame Source

Avril Lavigne climb from No. 21 to No. 8 on the Billboard chart, marking her first visit to the top tier, seemingly basking in the glow of the debut of the music video for “What the Hell” on January 24.

Avril recently spoke of her new song to ET Canada. “And it’s kinda like my older stuff so I haven’t had any music out in like 4 years I think we thought it was a good way to bridge into the new stuff!”

“What The Hell” is the first single off the 26-year-old Canadian rocker’s latest album, Goodbye Lullaby! (Boyfriend Brody Jenner makes a cameo in the video!)

In case you missed it, check out Avril’s stunning makeover in Vogue Italia here!

Watch the video after the jump!!