Davy Jones, the lead singer of popular 1960’s group “The Monkees,” died after having a massive heart attack Wednesday (Feb 29) in Florida. He was 66 years old.

According to initial reports from TMZ, the singer suffered the heart attack at a ranch where he was visiting his horses.

A ranch hand found the distressed singer sitting in his car, complaining that he wasn’t feeling well and he was having trouble breathing.

The ranch hand reportedly called the paramedics, and Jones was rushed to a nearby hospital where he was pronounced dead.

Davy Jones, pictured 2nd to the left holding the UK flag, with "The Monkees" in 1967

Along with Micky Dolenz, Michael Nesmith and Peter Tork, Davy Jones joined The Monkees back in 1965, and together, the group produced several popular songs, including three No. 1 hits: “Daydream Believer,” “Last Train to Clarksville” and “I’m A Believer.”

Davy Jones is survived by his wife Jessica and 4 daughters from previous marriages.

For more on Davy Jones’ life and career, visit Billboard.com.

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