Justin Bieber Mayweather

Justin Bieber Mayweather,Meet Selena...

Justin Bieber Mayweather

Looks like Justin Bieber is done living the bachelor life ... he actually brought his girlfriend Selena Gomez to Las Vegas for the Floyd Mayweather fight -- and she's gonna meet his boxing BFF.
Sources close to Bieber tell us the couple hit up the Hard Rock pool party Saturday and Selena was spotted with friends in a picture posted on Shots. Bieber also posted a pic poolside.

Justin Bieber Mayweather

We're told Selena and Floyd have surprisingly never met -- Biebs usually rolls to Vegas with his boys -- but he plans to introduce the two after the fight.

Normally Lil Wayne and J.B. walk Floyd to the ring ... but Weezy is on tour -- so right now it's looking like Wiz Khalifa will be taking his place.

Celebrity Dress Fashion Show

Selena Gomez:
Gomez was pretty in pink for Sunday night's Teen Choice Awards -- which happened to fall on her 20th birthday. For her birthday present, Selena Gomez & the Scene picked up a surfboard trophy for choice music group.

Taylor Swift:
Swift was pretty-as-a-princess in white as she picked up surfboards for choice female artist, choice single by a female artist "Eyes Open", choice country song "Sparks Fly" and choice movie voice "The Lorax".

Lea Michele:

The actress looked like her usual hottie self in this sparkly strapless mini. She also won choice TV actress: comedy for "Glee."

Carly Rae Jepsen:
Jepsen got our attention in a silky purple romper -- and picked up surfboards for choice breakout artist and choice song of the summer for "Call Me Maybe."

Justin Bieber:
The Biebs' performance attire was a flashback to the Michael Jackson era. He also picked up a few surfboards, for choice male artist, choice male music star of the summer, choice male fashion icon & choice single.

Kristen Stewart:
K-Stew -- in sexy leather pants and a blazer -- picked up choice female movie star of the summer for "Snow White and the Huntsman" among her usual batch of "Twilight" awards.

Demi Lovato:
The "X Factor" judge took a fashion risk in this short, feathered yellow dress -- and picked up awards for choice Twit and choice summer female music star.

Pauly D-ish:
The "Jersey Shore" and " Pauly D Project" star -- who won for choice TV reality star. looked perfectly Pauly D-ish.