Celebrity Butts

Mariann Gavelo has a huge ass. We're talking Kim Kardashian style HUUUUUUUGEEE ... and it was all out on display at a party in Hollywood last night.

Gavelo -- who appeared on "It's Always Sunny in Philadelphia" (the "Thunder Gun" episode) and in Will Ferrell's "Casa de Mi Padre" -- hit up the Maxim Hot 100 party with her badonk in tow.

Besides her dumper, Gavelo's a pretty petite chick, so we gotta ass -- is there ANY CHANCE that butt is real???

Discuss.

Rachel Bilson's undercover asset was exposed on a Caribbean beach -- and now her immaculate butt is finally getting the attention it so richly deserves. Cue the applause ...

Chris Bosh's wife Adrienne hit a Caribbean beach with their adorable 11-month-old son -- who was udderly overshadowed by his mom's booty-FILLED bikini.

If Selena Gomez was trying to find a way to make Justin Bieber REGRET breaking up ... this hot red outfit will probably do the trick.

Gomez -- and her butt cheeks -- were hanging out in Palmdale, CA this week ... where word on the street is that she was shooting a new music video.

Muy bien.

Baby got back ... or is it front? Are those buxom breasts or a bootylicious badonkadonk?

Just in case anyone forgot, Jennifer Lopez proved she's still bootyful last night.

The 43-year-old curvaceous diva showed off her God given talents at the premiere of her new film "Parker" in Vegas.

Here is a photo of surfer/model Anastasia Ashley catching a MASSIVE 35-40 foot wave at Phantoms on the North Shore of Oahu.

Couple of fun facts:
-- Ashley is super hot and her ass was featured in Playboy.
-- The area where she was surfing is known for having huge, dangerous surf.
-- She's in negotiations to appear on a reality show with a major network.

Meantime, it's 50 degrees and freezing in L.A. ... and the surf's flat too.

Jessica Alba took an 8-year break from being smoking hot to become ... smoking hot with kids -- and you know what that makes Jess and her legendary backside? Really attractive.

It's been eight years -- and two kids -- since she infamously bronzed her glorious God given talents in this amazing shot from 2005, butt we still gotta ask ...

Stephanie Seymour's butt is unavailable at the moment -- as it's currently on vacation in St. Barts.

If you would like to leave a message for the butt, please do so at the beep.

Rihanna's up to her usual thigh jinks again -- showing off her tight gams during a quick trip to Hawaii Friday ... and single-handedly raising the temperature of the Pacific Ocean in the process.