There are three artists using this name. 1. The Doubtful Guest is the alias of Libby Floyd, an American electronic music artist signed to the Planet Mu record label. 2. The Doubtful Guest is the name of an alt-country band. Check out their MySpace for some great tunes. 3. The Doubtful Guest (formed on august 6, 2002 and disbanded in spring of 2007) was a experimental trio out Chicago that gained a cult following in their time.