MTV's When I Was 17 series, which is in its second season, is essentially a way for artists, actors, and the like to shed some light on when they were, well, 17 years old. And until yesterday's episode, the series hasn't really featured anyone we would typically cover on Prefix. That changed, of course, when Questlove, of the Roots, appeared on the show. Along with other anecdotes, he explains how he was inspired to start making beats after seeing Stevie Wonder on The Cosby Show. You can watch Questo's appearance in the above video, though you will have to sit through interviews with Christina Perri and Vanessa Simmons, too.