Bruno Mars Serenades His 'Greatest Love': Watch
Bruno Mars Serenades His 'Greatest Love': Watch

Bruno Mars and his songwriting partner, Philip Lawrence, took some time to jam backstage last week, serenading their "greatest love" with an original piece called "Love Gone Sour."

Bruno Mars: The Billboard Cover Story

If it seems awkward that two men would sing a love song to the same woman, fear not, the object of their affection remains blissfully unaware of their sweet words. Watch below.

Yes, that is a bag of sour cream and onion Popchips sitting on Mars' piano, defiantly resisting his and Lawrence's advances.

The video, the latest in a series of viral ads from Popchips, proves once and for all that Bruno Mars is capable of making any subject sound romantic.