H-a-p-p-y B-i-r-t-h-d-a-y !!!!

Kevin Federline may have kept away from the party scene since gaining sole custody of his sons, but there's one bash he didn't miss: his own birthday party!

Sporting a stylish grey suit with a powder blue shirt and coordinating necktie, Britney Spears' ex-hubby hit Las Vegas' Pure Nightclub on Friday night to celebrate his 30th birthday, which he said he felt "great" about.

"I lost my voice at the craps tables and I lost all my money," Federline rambled on at one point encouraging everyone to have a good time as he got his hands on a microphone, before a pal dragged him away. After several hours of singing, dancing and drinking, Federline left the club before 2 AM and headed back to his Caesars Palace suite.

Category: Celeb Birthday , K-fed