She may not be the most well-known Celtics fan – that distinction probably goes to Donnie Wahlberg, Maria Menounos, or Dane Cook – but Aubrey O’Day is definitely one of the most enthusiastic. A singer/actress best known as a former member of P. Diddy’s girl group Danity Kane, O’Day took the red-eye from LA to make it to Thursday’s game against the Heat. And being superstitious, she even wore special clothes. “I have all these crazy superstitions,” she told us just before tipoff. “I have a specific pair of panties that I wear.” O’Day grew up on the West Coast but says she became a Celtics supporter after watching a few games with Boston fans. “I’d never seen anyone love basketball with such passion and devotion and loyalty,” she said. Asked to name her favorite player, O’Day had difficulty picking just one. “I love the way [Rajon] Rondo’s been playing, but you can’t deny The Truth,” she said, referring to Paul Pierce. “I love Ray Ray [Allen] being such a good man, and I love [Kevin Garnett] for his emotional outbursts.” Of course, O’Day wasn’t the only familiar face at the Garden Thursday. Also in the stands were Celtics alums Dana Barros, Jim Loscutoff, Walter McCarty, Robert Parish, and Satch Sanders; Patriots coach Bill Belichick, and players Deion Branch, Sergio Brown, Patrick Chung, Julian Edelman, Dane Fletcher, Rob Gronkowski, Devin McCourty, Brandon Lloyd, Jerrod Mayo, Wes Welker, Vince Wilfork, Donte Stallworth, Gerard Warren, and recently retired Matt Light; New York Giants receiver Victor Cruz; Philadelphia Eagles owner Jeff Lurie; actors Chris Tucker and Kenny Wormald; Red Sox owner Tom Werner; ESPN Sports Guy Bill Simmons; TV exec Dick Ebersol; and chef Ken Oringer.