Movie Theme Singer Jimi Jamison Dead At 63

9/2/2014 4:15 PM ET

Jimi Jamison, the voice behind such movie themes as "Burning Heart" from "Rocky IV" and "The Moment of Truth" from "The Karate Kid," has died at the age of 63. He sang both songs as the lead singer with the band Survivor, best known for their hit "Eye of the Tiger."

Jamison joined the band just after "Eye of the Tiger" was released and replaced lead singer David Bickler.

"After 'Eye of the Tiger,' the fans wanted an album full of songs like 'Eye of the Tiger,'" said Jamison to the LA Times. "An average or a good album wouldn't be enough. The band needed a great album and some huge hit singles. But it didn't happen."

Jamison passed of a heart attack at his home in Memphis and news of his death first appeared on his Facebook page earlier this week.

"We are saddened and heartbroken to announce the passing of a great musician, loving father and grandfather, and overall extraordinary, giving, and kindhearted human being," the post said. "He's loved by so many, most of all his family, and he will be incredibly missed by all. Please keep his family in your prayers, and please give them the privacy they need during this extremely difficult time. Thank you all for your condolences and kind words."