Being close enough to LA and going to the Cs games there (tomorrow night sadly not included because of work - I'd love to see a 40 point victory in person), Donnie Wahlberg's the only celebrity I ever saw at Staples Center done up head to toe in Celtics gear. At a Clippers game. During the 03-07 years. That's a fan.
To me, Donnie's on another level as a celebrity fan, in my opinion. Many of these famous fans never turned up until last year, Fallon style. Not saying Damon is like that, he seems legit, I'm just saying I consider Donnie a special case. Especially when names like Ellen Pompeo are being thrown out.