Scott Bradlee's collective of musicians, known as Postmodern Jukebox, is famous for re-imagining pop songs in different genres, and they never cease to amaze.
You might remember how they transformed Miley Cyrus' "We Can't Stop" into a 1950s doo-wop track, or how they changed Robin Thicke's "Blurred Lines" into a bluegrass hit.
Well, when they saw that Lady Gaga had beat them to a jazz version of her latest hit "Applause," the group had to up the ante, and give Gaga a run for her money.
Check out this 1940s rendition of "Just Dance," which has become "Just Tap Dance," with the help of tapper, Alex MacDonald and voice talents of Robyn Adele Anderson.
It's hard to decide which version is better.