Bâtard Pop XXV: Preparing the Duff Posted on 11/09/2013 /Under Musique, Video Even a tame mainstream ditty like Duffy’s Warwick Avenue suddenly works when fused with Serge’s Je t’aime. Kleptomaniac: Phil RetroSpector. Art form: Mash-up, of course. Verdict: Perfect crime. Check his site for more.