<iframe width="560" height="315" src="http://www.youtube.com/embed/KRaWnd3LJfs" frameborder="0" allowfullscreen=""/> Maroon 5 singer (and star of The Voice USA) Adam Levine is in his element in Samuel Bayer's gun-heavy cinematic promo for the band's next single Payphone. Could be easily mistaken for a summer blockbuster...