Courteney Cox Arquette and Jennifer Aniston
Carlos Diaz/INF; Steve Granitz/WireImage
While John Mayer
treated Jennifer Aniston
to a song
for her 40th birthday, Courteney Cox Arquette
offered a heartfelt message to her longtime Friend
"More health and happiness," says Cox Arquette, 44, who revealed the birthday wish at Monday night's Beverly Hills benefit for the Entertainment Industry Foundation's Women's Cancer Fund.
Aniston's actual birthday is Wednesday, but she and her pals celebrated Saturday at Aniston's new Beverly Hills house, where Cox Arquette danced the night away with Sheryl Crow
, 47, who shares the same Feb. 11 birthday with Aniston.
"I can't remember the last time I did that," Crow told Extra
at the benefit, sponsored by Saks Fifth Avenue. "So that was a sign of a good party!"
Although Aniston recently fretted about finding a gray hair,
close friend Andrea Bendewald tells PEOPLE that Aniston has never been better.
"Happy on the inside, happy on the outside," Bendewald says. "She's always known how to have a good time and really live life to the fullest. I think it's a state of being. It's a state of what you think is what you are."
Reporting by SCOTT HUVER and JENNY SUNDELRELATED GALLERY:
David Arquette calls Courteney & Jen 'great support system for each other'