Over the weekend at Austin's SWSX music festival our dude Sinkane — who crafted one of the very first Africa In Your Earbuds mixtapes — was called onstage by none other than R&B prince Usher and indie-rock pioneers The Afghan Whigs to perform "Runnin'," a song we premiered here almost a year ago. Usher and Sinkane ran amok onstage, both jumping, gyrating and shouting the falsetto croons to Sinkane's single — and, yes, Usher and The Afghan Whigs knew every word and drum fill. Watch it below, starting at the 23-minute mark via FADER Fort.