CELEBRITY BIRTHDAYS (10/18/11): Zac Efron 24 - Young stud who played Troy Bolton, the captain of the basketball team, in the "High School Musical" movies, and the young Matthew Perry in "17 Again"

--Ne-Yo 29 - Singer/song writer. Real name: Shaffer Chimere Smith. Lindsay Lohan sued him and Pitbull this past August for name-checking her on "Give Me Everything" ...

--Bristol "The Pistol" Palin 21 - Sarah Palin's oldest daughter. You know, the one that got knocked up, became a teen mom, and now gets paid to speak to kids about sexual abstinence. She came in 3rd on last fall's season of "Dancing With the Stars" despite her low scores week after week.

True Dat Fact: Bristol got "corrective jaw surgery" this past May. That's her new face in the above picture. This is her old one.

--Freida Pinto 27 -"Slumdog Millionaire" and "Rise of the Planet of the Apes" hottie. She'll be back in theaters next month in the Greek mythology movie "Immortals".

--Tyler Posey 20 - MTV's new "Teen Wolf"

--Jean-Claude Van Damme 51 -The Muscles from Brussels. AKA Van Damage. He's currently filming  the "The Expendables" sequel along with Arnold Schwarzenneger, Bruce Willis, Chuck Norris, Jason Statham, Jet Lei, and Sylvester Stallone.

--Chuck Lorre 59 - Creator of "Two and a Half Men" and "Big Bang Theory", and executive director of "Mike and Molly". He and Charlie Sheen had a very public falling out earlier this summer. Maybe you heard something about it? According to Charlie, Chuck is a "turd", a "clown", and a "maggot." Hey, at least he's not a troll ...

--Mike Ditka 72 – Former NFL Hall of Famer player and head coach. Currently a commentator for ESPN.

True Dat Fact: Ditka is only one of two people to win Super Bowls as a player (Da Bears), an assistant coach (Da 'Boys) , and a head coach (Da Bears). The other is Tom Flores.

--Dawn Wells 73 -Mary Ann on "Gilligan's Island". She’s one of only three of the seven original castaways who are still with us. The other two are Tina "Ginger" Louise and Russell "The Professor" Johnson. Survey Says: I'd still hit dat!

--Erin Moran 51 - Joanie Cunningham on "Happy Days" and "Joanie Loves Chachi".

Watch:Erin was also in the early 80's sci-fi "Galaxy of Terror" and got ripped apart by some giant maggot. Check out her death scene. Freaky Deaky...