Las Vegas-based R&B star JR Castro gained his fair share of buzz off of his last single, "Get Home," and its accompanying guest appearances from Kid Ink and Migos' Quavo on the DJ Mustard-produced beat. These days he's gearing up to release his next mixtape, which will be executive produced by Timbaland. 

Today, he drops another promising single with "M.O.B." complete with a guest verse from Pusha T all about trust, love and heartbreak. Produced by DJ Camper (Jay Z, Nicki Minaj, Big Sean), "M.O.B" slow things down a bit but shows how promising the Vegas singer is. Stream it below: