Rapper T.I. announced on Monday he is releasing a new mixtape titled "Fuck Da City Up" on New Year's Day.  Not much has been released in the way of details, but T.I. did tell his 1 million-plus Twitter followers that the mixtape will be "the 1st thing yall hear next year."  In the meantime, T.I. is also among the rappers who participated on a remix of Ke$ha's "Sleazy," which debuts on iTunes Tuesday.  Dubbed "Sleazy 2.0 (Get Sleazier)," the remix also features contributions from Andre 3000, Wiz Khalifa and Lil Wayne, and was co-produced by Benny Blanco, Dr. Luke, and Bangladesh.