John Barrowman had a CD and you waited until now to tell me? Strike one, Spotify.
A bunch of them!! here’s the list http://www.johnbarrowman.com/fanzone/music/musicindex.shtml
Many available on Amazon, iTunes & Google Play
I’d also like to point out that Spotify also has the 2003 “anything goes” cast album. Which includes John. And his “Swings Cole Porter” album.
And John has a track by track thing on Spotify for “You Raise Me Up” where he talks about the songs.