Crow and Cox Groove at Aniston's Birthday Bash!


Jennifer Aniston's 40th birthday bash was a night to remember -- the former "Friend's" friends Sheryl Crow and Courteney Cox danced deep into the night at the star-studded party.

"I can't remember the last time I did that," Crow told "Extra" of shaking it on the dance floor. "So that was a sign of a good party!"

Aniston rang in the big 4-0 with a private birthday party at her house on Saturday. Jen celebrates her actual b-day today, February 11.