Just when you thought Sia couldn't top herself, she comes swinging back (from the chandelier) with her own answer to 'Say Something'. Sia has penned a power ballad duet for Maroon 5's upcoming album V and it may be one of the best songs they've ever released.

When it was announced Gwen Stefani would be joining The Voice as a judge this fall, it was only logical to assume that Gwen would be returning to solo music very soon. From various performances of 'Hollaback Girl' to this duet, it's only a matter of time before she releases a new album and restores my faith in pop music.

'My Heart Is Open' is a gorgeous power ballad, and it perfectly suits both Adam Levine's and Gwen's vocals. The song has that simple yet powerful captivating power of 'Say Something', but I think these two give their song more emotion when they harmonize. It's chilling, and Gwen's vocals just steal the show as it spreads like butter over the somber tones of the piano.

C'mon, Gwen we're waiting for you to hollaback with new music. We need you to save the industry.

Maroon 5's fifth studio album V will be released on September 2nd.