Sammy Hagar

Hard rock and metal's biggest stars are performing Black Sabbath and Ozzy Osbourne covers all day and all night.

Helping Hands Concert and Auction featured several guest performers.

Bickering musicians, fan-boy moments, previously unknown secrets .... they're all some of the instances that Howard Stern have given us radio gold.

Red Rocker bet the thrash icons they would go platinum in 1988, but only two members paid up when he won.

These songs rocked, then rolled over into the mainstream.