Keith Wilder, the lead singer of the '70s funk band Heatwave, has died at the age of 65. Wilder's had several massive hits, including "Always and Forever," "Boogie Nights" and "The Groove Line."

Wilder had been suffering from serious health problems recently and died in his sleep Sunday, according to his cousin and bandmate, Billy Jones.

The group was nominated for 2 Grammys but didn't win.