You wanna feel old? Play the "Who's Reaching a Milestone Birthday This Year?" game. It's always good for a few remarks like, "Really, he's that old?" or "Seriously, she's only 40?" So let's find out, according to, who hits a milestone birthday in 2013.

The Big 3-0

Next December 2, it'll be a VERY happy 30th birthday for Green Bay QB Aaron Rodgers if he'll be wearing yet another Super Bowl ring earned by way of another big February victory. His Packers are the NFC's 3-seed.

I was "Blown Away" to learn that country superstar Carrie Underwood will hit the big 3-0 in 2013, on March 10. She's been a "Good Girl," so I wonder how many gifts she'll get.

Speaking of gifts, I'd imagine Blake Shelton will be beating the bushes for just the right gift for his lovely wife, Miranda Lambert. The Country Music Association's reigning Female Vocalist of the Year will turn 30 on November 10.

The Big 4-0

Has whoever it is on How I Met Your Mother actually MET his mother, yet? (I don't watch the show.) Well, they might have pause their search on June 15. Co-star Neil Patrick Harris will be celebrating is 40th birthday. Doogie Howser is all grown up.

By now the Huxtables could have GREAT-grandchildren, let alone grandchildren. Tempestt Bledsoe, who played middle daughter Vanessa on The Cosby Show, will be 40 on August 1.

On July 23, former White House intern Monica Lewinsky will turn 40. Maybe, well...she could...I think...then again.... Oh, never mind.

The Big 5-0

Wow! There are so many here, I don't know where to start.

Brad Pitt's gonna be 50! Of course, it's nearly a year away--December 18--but it still counts. That means he was already in his late 20s when he co-starred in his breakthrough film Thelma and Louise. You know, for the longest time, I couldn't have cared less about a Brad Pitt movie. But, as it turns out, he's been in a lot of movies I really like, including Seven, The Assassination of Jesse James by the Coward Robert Ford, Moneyball, and Babel. In fact, I own all of them.

I wonder if Johnny Depp will sneak back into his hometown to celebrate the big 5-0 on June 9. That, of course, would be Owensboro. (For those of you who just landed, and didn't know that.) I hear rumors all the time that the superstar actually does that. Those rumors have never been confirmed, which means one of two things: Either they aren't true, or he's really good at it.

I remember watching Mike Jordan nail the jump shot that helped the University of North Carolina take down Georgetown in the 1982 NCAA Basketball Championship. Then I remember his other-worldly career with the Chicago Bulls, which included six NBA Championships. Then I remember watching the press conference in which, arguably, the greatest basketball player who ever lived retired.  Oh, I know he came back and played for the Wizards a little. But I try not to think about it. He is now, of course, Michael Jordan and a living legend and he will be 50 on February 17.

There are so many more big names hitting milestones this year that there's not enough space to name them all. Are you celebrating such a birthday in 2013? Well, here's hoping you can make it a great one!