While fans await her untitled sophomore album, a demo track from British indie-pop singer/songwriter Marina & The Diamonds has surfaced on the 'net. Rather than being a reference song for that album, the song entitled "Sinful" is a cut that didn't make her 2010 debut effort, The Family Jewels. Marina is currently performing throughout the U.S. on her Burger Queen Tour and is set to join Katy Perry and Robyn for Perry's California Dreams Tour this summer. Check out the dates for both tours here.

Source: Hard Candy Music