Vic Mensa has signed with Roc Nation—and he's already dropped his first release on the new label, the Kanye West-featured "U Mad." Roc Nation announced their newest artist with a short and simple tweet that linked to the single on iTunes. What's even more surprising however is the story behind Mensa's signing: Roc Nation music executive Lenny S. shared how he locked down Vic Mensa on his Instagram and apparently it wasn't easy.