Bruno Mars and Nick Jonas perform for New York diners

Bruno Mars and Nick Jonas surprised diners in New York City by putting on an impromptu show at a restaurant.

The two stars dined separately at The Darby eaterie in Manhattan last weekend (19-20May12) and they both took to the stage to sing in back-to-back performances.

Mars thrilled other patrons with a rendition of his hit track Grenade, while Jonas sang Stevie Wonder classic Superstition, and they both received a standing ovation, according to New York Post gossip column Page Six.