The Legendary Roots Crew have a history of drawing legendary talent to the Late Night with Jimmy Fallon stage, and recently they invited another living legend to join them and do his thing. Ronald Isley, fresh off releasing his smooth This Song Is for You, sat in with the band before a taping of LNWJF to perform his Isley Brothers classic "It's Your Thing." Though he seems a bit rusty as the song starts (and he's entitled to, seeing as the song turned 44 this year), he quickly finds his groove and gives the audience his all. He might not be giving the kind of performance he was giving 44 years ago, but if you ask me, he's not doing bad at all for someone who recently celebrated his 72nd birthday. Press play and get yourself a dose of Mr. Biggs doing the damn thing.