Hip-hop mogul Sean "Diddy" Combs was hospitalized briefly Sunday night after suffering a "massive headache" following a Grammy party he hosted at the Playboy Mansion.  According to TMZ, Diddy's entourage  ignored his objections and drove him to a local hospital to be on the safe side.  Combs has yet to commment on the story, but TMZ quoted a source close to Diddy that said the headache was not related to anything that took place at the party.