There are at least two acts called American Express.

1. American Express was the name that Young Love used when he had his demos on myspace.com including "Find a New Way".

2. Under the name "Bluesy Huey Lewis," Huey Lewis played harmonica on Thin Lizzy's 1978 landmark album Live and Dangerous. That same year, he was playing at Uncle Charlie's, a club in Corte Madera, California, doing the "Monday Night Live" spot along with future members of his band, Huey Lewis & The News.