Adele's Monday night appearance on The Tonight Show Starring Jimmy Fallon was so big, it needed a whole other day.br On Tuesday's episode of The Tonight Show , the 27-year-old singer, host Jimmy Fallon, and The Roots appeared in a taped segment to perform "Hello" with classroom instruments.br Adele was a guest on Monday's episode of The Tonight Show , playing a game of "Box of Lies" and performing "Water Under the Bridge" off 25 .br Released last week, Adele's new album has already sold more than 2.4 million copies, the largest amount of first-week sales since 2000 .