Pharrell Williams stunned members of the Harlem Gospel Choir on Monday (26May14) when he joined them on TV for an uplifting a capella version of his hit Happy.
The nine-piece choir was performing a mash-up of gospel favorite Oh Happy Day and the hitmaker's tune on VH1's Big Morning Buzz when he stepped out from behind a curtain.
The singers kept their composure and sang on as Pharrell clapped along.
After the performance he told host Nick Lachey, "This is an amazing gift... We're blessed."
Williams is taking the morning show this week (beg26May14), performing tracks from his new album G I R L every day.