The underwear model, who dated Cyrus for nine months until June 2009, admitted that he would happily record a song with his former flame.
"Ah sure. In the future, if it's a great song then why not," he told MTV.
Gaston claimed that the pair could re-record Cyrus' single 'The Climb' and re-name it 'The Climb Part 5... Million'.
While, Justin is willing to have a sense of humor about the whole thing, we can't ever forget that Miley and ex-beau Nick did record that song "Before the Storm" together. So, we hold out hope that Justin's debut will contain a similar track.