Bruno Mars knows a compliment when he sees it. BTS could have covered any song when they crammed into James Corden's car on Tuesday night's (Feb. 25) latest edition of "Carpool Karaoke." But what songs did they take on? The Friends them and, of course, Mars' "Drippin' in Finesse." Bruno caught the performance and just had to give the K-pop superstars a shout-out.