Sean 'P Diddy' Combs may be used to celebrating Christmas in style - but this year, he's spending it behind bars after being accused of a string of serious crimes. The American rapper spent his 55th birthday and Thanksgiving in jail at Brooklyn's Metropolitan Detention Center, where he is awaiting trial after being charged with sex trafficking, racketeering conspiracy, transportation and engaging in prostitution . Now, Combs - who has performed under the names Diddy, Puff Daddy and Love - will