Jimi Jamison, the lead singer of 1980s bands Cobra and Survivor, died on Sunday night at age 63.

The singer's booking manager Sally Irwin said he died of a heart attack.

Survivor, best known for their song "Eye of The Tiger" from Rocky 3, had just performed together on Saturday night in Southern California.

Jamison provided the vocals for the band's hits like "The Moment of Truth" from The Karate Kid, "Is This Love," and "Burning Heart" from Rocky IV. As a solo artist, he recorded the track "I'm Always Here," which became the memorable theme song for the TV series Baywatch.