Kevin Federline aka K-Fed was spotted suckin in his gut in Vegas this weekend celebrating his 30th birthday at Pure Nightclub in Caesar’s Palace.? Rumor has it that the Ex-Mr. Britney Spears?may have been?paid as much as $175,000 to appear at his own birthday party!? At least we no longer have to worry bout him trying to rap… 😯 There was?no sign of Britney, but baby-momma numero uno, Shar Jackson showed up to make sure the check cleared. (Source)