Queen guitarist Brian May features on Lady Gaga's 'Born This Way' album.

Lady Gaga is firing back at a music producer who claims he launched her career and is suing her for $30.5m (€22m).

A songwriter and music producer claims pop star Lady Gaga squeezed him out of her lucrative career after he co-wrote some of her songs, came up with her stage name and helped her get a record deal.