Madonna is the main feature in the May 2010 issue of the über alternative Interview Magazine. The pictorial shot by Mert Alas & Marcus Piggott displays Madonna at her best and is hands down her best photoshoot within the last few years. The shoot is provocative, sexy, powerful and every other empowering quality that makes Madonna who she is. Read the cover feature here. View the complete gallery as well as a behind-the-scenes video after…