Rocker Joan Jett, 67, cancels concerts due to scary injury that led to surgery

The "Bad Reputation" singer underwent a secret surgery after breaking her back.

Mariano Regidor / Getty Images ZZ Top axed their Hollywood Bowl concert Wednesday with hours to go before showtime, blaming “unforeseen personnel matters.” The Texas trio entered the Rock & Roll Hall of Fame in 2004. Guitarist Billy Gibbons, 76, now fronts a lineup with Frank Beard, 77, on drums and Elwood Francis on b