CELEBRITY BIRTHDAYS (5/3/11): Cheryl Burke - 27  "Dancing with the Stars"  pro dancer who helped Drew Lachey and Emmitt Smith win the second and third seasons.  She couldn't resist Chad Ochocinco's charm during season 10 and finally admitted in February to having a "fling" with him ...

And don't expect her follow in fellow pro dancer Karina Smirnoff's footsteps and pose nude for Playboy. "I would never do it," she tells E! Online. "These are my private parts that only I can see...I would never show my boobs or that area."

--Christina Hendricks - 36  Voluptuous "Mad Men" minx famous for her red hair and TRIPLE- D's ...

Her hair, by the way, is fake.  She's a natural blonde.  As for the girls, there's a good chance they're not natural either. Although she hasn't admitted to getting any work done, she posed for "Playboy" in a bikini back in 1999 and didn't look as busty back then ... (She's the one on the far right)

--Dulé Hill - 36  Gus on the USA Network's  "Psych".  He used to be Presidential Aide Charlie Young on "The West Wing" ... 

--Greg Gumbel - 65   He does NFL and NCAA basketball for CBS ...

--Christopher Cross - 60  Remember "Arthur's Theme (Best That You Can Do)",  "Ride Like the Wind" and "Sailing"??? I DO!!! Best. Song. Ever.

--Frankie Valli - 77  The leader of The Four Seasons.  Google them kids! His real name:  Francis Stephen Castelluccio. Remember "Grease" ? I DO!!!