In March 2008, "The Odd Couple", the second album of his and CeeLo Green's Gnarls Barkley project, was released. In May 2008, an album with Martina Topley-Bird, titled "The Blue God", was released. Martina collaborated on "All Alone", one song on the Danger Mouse produced Gorillaz second LP, "Demon Days". Also released in May 2008 was "Replica Sun Machine", an album with the band The Shortwave Set, including a collaboration with Van Dyke Parks and the Velvet Underground's John Cale, according to British music magazine "New Musical Express".