Just days after releasing her new album, 25 [1], Adele dropped by The Tonight Show on Monday to deliver yet another show-stopping performance of her hit single, "Water Under the Bridge." With her commanding presence and impressive vocals, Adele proved once again that she is a force to be reckoned with. Watch Adele rule the stage in the clip above, and then see her and Jimmy Fallon face off in a hilarious game [2] of "Box of Lies."