Miranda Lambert will sing her current single, "Only Prettier," on the Grammy Nominations Concert on Wednesday (Dec. 1) on CBS. The one-hour special, airing at 10 p.m. ET/PT, will also include performances by Train, Justin Bieber, Katy Perry, rapper and singer-songwriter Bruno Mars. Lambert will also perform on The Ellen DeGeneres Show on Monday (Dec. 6). Her upcoming CMT on Tour dates include Loveland, Colo., on Sunday (Dec. 7), Prescott Valley, Ariz., on Dec. 9 and Las Vegas on Dec. 10. She will ring in New Year's Eve with concerts in Temecula, Calif., on Dec. 30 and Dec. 31.