Steven Tyler and Roger Daltrey are joining forces to sing the praise of the doctor who saved their voices.

The rockers will perform at the Raise Your Voice Benefit, where Dr. Steven Zeitels will be saluted for his pioneering work, on 24 January (13) in Los Angeles.

Zeitels used modern voice restoration techniques and a patented vibrating gel technology to help The Who and Aerosmith singers hit the high notes again following recent vocal issues.

Last year (12), Daltrey told Rolling Stone magazine he had been left stunned by the doctor's work after he turned to Zeitels for vocal aid.

He said, "To have the range you had as a youngster, with all the emotional input that life has given you - that's going to lead to some amazing performances."