Posted on April 15, 2016 by laureng John O’Callaghan of The Maine starts new side project John O’Callaghan, front man of The Maine , has released a new song titled “Sour Grapes” under the name John The Ghost. An EP will be out on April 29th. Related posts: Watch Fall Out Boy perform Immortals on Jimmy Kimmel Live NF releases music video for “Intro” Leon Bridges performs “Coming Home” on Conan Matinee announces September shows