Backstreet Boys join Jimmy and The Roots to perform their hit "I Want It That Way" with classroom instruments. See the full instrument list below: Brian Littrell - Vocals, Apple Shaker, Wood Block Nick Carter - Vocals, Tambourine Kevin Richardson - Vocals, Güiro AJ McLean - Vocals, Maraca Howie Dorough - Vocals, Coconuts Jimmy Fallon - Vocals, Bass Drum, Casio Keyboard, Apple Shaker Questlove - Hand clappers Kamal Gray - Xylophone James Poyser - Melodica Captain Kirk - Ukulele Tuba Gooding Jr. - Kazoo, Apple Shaker Mark Kelley - Kazoo Stro - Bongos Black Thought - Triangle Subscribe NOW to The Tonight Show Starring Jimmy Fallon: http://bit.ly/1nwT1aN Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35/10:35c Get more Jimmy Fallon: Follow Jimmy: http://Twitter.com/JimmyFallon Like Jimmy: https://Facebook.com/JimmyFallon Get more The Tonight Show Starring Jimmy Fallon: Follow The Tonight Show: http://Twitter.com/FallonTonight Like The Tonight Show: https://Facebook.com/FallonTonight The Tonight Show Tumblr: http://fallontonight.tumblr.com/ Get more NBC: NBC YouTube: http://bit.ly/1dM1qBH Like NBC: http://Facebook.com/NBC Follow NBC: http://Twitter.com/NBC NBC Tumblr: http://nbctv.tumblr.com/ NBC Google+: https://plus.google.com/+NBC/posts The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show including: comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives. Jimmy Fallon, Backstreet Boys & The Roots Sing "I Want It That Way" (Classroom Instruments) http://www.youtube.com/fallontonight