The 2011-12 NBA season officially kicked off on Christmas Day (Sun. Dec 25) with a number of basketball games, including the Boston Celtics vs. New York Knicks game at Madison Square Garden, which was attended by R&B singer Alicia Keys, her producer/rapper husband Swizz Beatz and their 14-month-old son Egypt.

Other celebs spotted at the Celtics/Knicks game were Spike Lee, Chris Rock and Tracy Morgan.

Check out 10+ photos below: