VAN HALEN frontman DAVID LEE ROTH has always had musical interests that expand well beyond the scope of rock ‘n’ roll, and he’s proven it once again with a new edition of his YouTube series ‘The Roth Show.’

In the clip (embedded above), ROTH has met up with New York a cappella group Naturally 7 backstage following their Tokyo show on April 20, and everybody’s singing — but rather than harmonizing on a classic Van Halen cut or perhaps one of Dave’s solo hits, they decide to deliver an impromptu rendition of Pharrell Williams‘ ‘Happy.’