There are several bands called The Knack. For the less famous ones: see below. The by far most famous and successful ones were the 'My Sharona' guys from Detroit, MI, United States.
These are videos from concerts where The Knack played, so they may be of other bands that played the concert as well.
The Knack / Box of Daylight / Lapdog / Sea of Black May 6, 1994 Seattle, Washington, United States Added by Ric Kilmer
The Knack Mar 18, 1979 New York, New York, United States Added by Callaghanmichael Us
