A Guest died at celebrity hot spot LIV nightclub at the Fontainebleau in Miami Beach early yesterday, shortly after he attended Thursday night’s Knicks-Heat game at the American Airlines Arena. According to reps for the resort hotel, the unidentified man, 31, arrived with friends at about 12:30 a.m. while international house DJ Sander Kleinenberg was spinning. The victim collapsed unconscious after just 10 minutes. Security performed CPR and police were called. Friends of the victim told cops their pal had been drinking and doing cocaine earlier. He was rushed to Miami’s Mount Sinai Hospital, where he later died. A Miami Beach Police rep said the cause of death is under investigation. Celebrities who have recently partied at LIV include Paris Hilton, Naomi Campbell, Minka Kelly, LeBron James and director Michael Bay, who celebrated his 47th birthday at the nightclub last weekend with Joe Jonas and Jerry Bruckheimer.