Mario Lopez celebrates his birthday a little early...

It must be so much fun to be Mario Lopez.

The host of TV's "Extra" doesn't officially turn 35 until Oct. 10 but when you have a busy schedule like Mario's, you gotta celebrate when you can. So here he is in Las Vegas over the weekend partying it up.

Mario really is one of the hardest working men in showbiz. He had a long run on Broadway in "A Chorus Line" this year, is shooting another guest spot on FX's "Nip/Tuck" and a few weeks ago, was promoted from co-host of the weekend edition of "Extra" to the solo host of the show each weekday.

A.C. Slater has done quite well for himself.

Bonus Video: Here is Mario during a visit to Ellen DeGeneres' talk show. He was promoting his workout book earlier in the summer and...SPOILER ALERT.. if you watch to the end, you'll get to see his abs!