Taylor Swift and Luke Bryan have joined the lineup for the Grammy nominations concert on Dec. 5 in Nashville. Swift will co-host the event with LL Cool J. Meanwhile, Bryan will perform at the concert, as will Maroon 5. This will be the first time the Grammy nominations concert will be held in Nashville. Following the one-hour live nominations telecast, one of the evening's performers will perform a one-hour concert for the audience at Nashville's Bridgestone Arena. That artist has not yet been announced. The Grammy Awards will take place Feb. 10 in Los Angeles. The nominations concert and the awards show will air live on CBS.