Matthew Koma hilariously dressed up as wife Hilary Duff’s ex Joel Madden for a Halloween double date with Joel and his wife Nicole Richie. Musician Matthew and former Disney star Hilary wore matching MDDN hats – the name of Good Charlotte rockers Joel and Benji Madden’s music company – and shades as the ‘Lizzie McGuire’ star went as his twin Benji. Matthew captioned a snap of the pair: “Going as @benjaminadden and @joelmadden to a Halloween dinner with @joelmadden and @nicolerichie.” Hilary, 37, dated the ‘Lifestyles of the Rich and Famous’ singer, 45, from 2004 to 2006, and previously reveale…
