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)