E.C. & The Attractions doing a commercial for his 1980 LP
Twenty songs on a single album, ten songs on each side, and most of them are good ones. I listened to this today and it's nearly as long as London Calling! (a double album that only has 19 tracks).
I'm also a fan of Ten Bloody Marys, Elvis's 1980 UK B-sides and rarities collection that also has 20 tracks, ten on each side. Almost (but not quite) identical to the U.S. record Taking Liberties, this might be my favorite Costello collection. His B-sides are better than most people's A-sides, sometimes even his own.