Chubby Checker, has launched a $500m law suit against an app that claims to be able to estimate the size of a man's penis from his shoe size.
The app, The Chubby Checker, takes its name from the word "chubby" which in the Online Slang Dictionary is defined as an erection.
The US singer, who shot to prominence with the song "The Twist" in 1961, is seeking damages from Hewlett-Packard and its subsidiary Palm Inc.
He maintains he owns the rights to the name Chubby Checker.
An HP spokesman said: "The application was removed in September 2012."