Previously releasing music under the moniker Eagles In Drag, the Maine's John O'Callaghan has unveiled a new side project: John The Ghost. Listen to the first single, "Sour Grapes," and an Instagram announcement from O'Callaghan below, and let us know what you think in the comments.

Read more: The Maine frontman’s radio show available to stream in its entirety

"Sour Grapes" comes from John The Ghost's forthcoming six song EP Sincerely, John The Ghost. Pre-order the EP here, along with a 90-page book, prior to its release on April 29.

Watch more: APTV SESSIONS: The Maine - "Sad Songs"