Taylor Swift is representing the country genre at the Grammy nominations concert on Wednesday night (Dec. 3) in Los Angeles. She is co-hosting the event with LL Cool J. The concert will air on CBS at 9 p.m. ET. Mariah Carey, Celine Dion, Foo Fighters, B.B. King and John Mayer are also scheduled to appear. This is the first time the nominations will be revealed in prime time. However, not all of the nominations will be announced on the special. The Grammy awards will be held on Feb. 8.