To promote British singer-songwriter Jessie Ware's latest album Devotion, Studio Moross and Red Bull Studio London proved you don't need black-light paintings or expensive digital setups to make a really cool interactive billboard. Currently mounted in London's Broadway Market, the billboard features hundreds of dots that revealed Jessie's head as they were colored in by passersby. Oh, and her album is playing the whole time (which could add or detract from the experience, depending on your taste). The whole display is fantastic, if for no other reason than now I get to add "Pointillism in Advertising" to the list of things I thought I'd never see. More images after the jump.