Despite a courageous battle against cancer, The Knack lead singer Doug Fieger lost his life today.

Fieger, 57, had suffered from health problems since he was diagnosed with lung canger in 2005, and two brain tumors in 2006, but family and friends say he kept a positive attitude throughout chemotherapy and other treatments, continuing to perform whenever possible despite having lost half a lung.

In late 2007, the tumors apparently reappeared, and he reportedly underwent an experimental treatment.

In 2008, he was still undergoing chemo, but looking forward to being done with it by January 2009, since it had gone into remission.

The Knack's most memorable song is 'My Sharona' which came out in 1979, and was an instant dance hit that, unlike many old disco songs, has survived the years to be played at millions of parties, by just as many cover bands.

Sharona was a real girl; she and Fieger dated from 1979 to 1982, and remained pals over the years.

Fieger died at his home in Woodland Hills, California. His brother, attorney Geoffrey Fieger, confirmed the singer's death.

Members of The Knack have cancelled all dates to perform, and posted on their website: Doug Fieger August 20, 1952 - February 14, 2010 Our hearts are broken, we will miss you Doug.

Here is an amateur video of Fieger performing My Sharona onstage in 1979. May he always be remembered so full young and full of life!