The Twittersphere has been having its own version of a coming out party for NBA star Jason Collins.

Jason made worldwide headlines yesterday when he became the first active American athlete from a major sports team to reveal he's gay. He declared in an upcoming issue of Sports Illustrated: “I’m a 34-year-old NBA center. I’m black. And I’m gay.”

Numerous celebrities have showed their support via Twitter including Ellen DeGeneres, Katy Perry and Howard Stern. Find out what they had to say after the jump!

Katy Perry is an expert at color coordinating, and while that usually involves matching her ever-changing hair color to red carpet outfits, on Monday she had another specific shade to match while promoting her movie The Smurfs 2 in Mexico for Summer of Sony 2013. Yep... blue of course!

Attending a photocall during the day and a party for the film at night, Katy rocked two different blue-hued dresses, and naturally looked gorgeous in both. But which was her better look? Check 'em out after the jump and cast your vote!