Jimmy Welcomes Guest Musician Gregg Almond (Will Forte)

Jimmy greets Roots sit-in guitarist Gregg Almond (Will Forte), who discusses his terrible nut allergy and performs a song dedicated to his identical cousin. Subscribe NOW to The Tonight Show Starring Jimmy Fallon: Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35/10:35c Get more Jimmy Fallon: Follow Jimmy: Like Jimmy: Get more The Tonight Show Starring Jimmy Fallon: Follow The Tonight Show: http://Twitter.