The rocker co-wrote several of Whitesnake's biggest hits, including "Is This Love" and "Still of the Night." John Sykes, the electrifying guitarist who rocked the world in legendary bands Whitesnake and Thin Lizzy,

John Sykes, guitarist with Whitesnake and Thin Lizzy who co-wrote the hit singles 'Still of the Night' and 'Is This Love,' has died. He was 65.

John Sykes, the guitarist whose talent helped propel Whitesnake to success, is dead at 65. He also worked with the bands Thin Lizzy and Blue Murder.