The 70s were a crazy time. A lot of TV and movie stars cut record albums for some reason. Not that celebrities singing isn't something that still goes on today, but back then they would often sing as their characters or in the tone of their characters.

Like The Odd Couple's Jack Klugman and Tony Randall singing (and arguing as Oscar and Felix) "You're So Vain." Most of it is sung by Klugman, and it's truly bizarre.

[via Bill Corbett]