Katy Perry joins country music star Kacey Musgraves on "CMT Crossroads". The two popular singers will sing together as they perform each others songs.

Get a sneak peak above with the two performing Perry's "Roar" and see "crossroads" in full tomorrow night (Friday, June 13, 2014) on CMT starting at 9:00 (central time) to catch other hits like "Firework" and Musgraves "Follow Your Arrow" and "Merry Go Round"... rumor has it that the two will even cover a Dolly Parton song.