Keith Wilder, the lead singer of GRAMMY-nominated '70s R&B/funk hitmakers Heatwave, died Oct. 29 at the age of 65. Wilder's death was confirmed by the group's manager, Les Spaine, via Rolling Stone. No specific cause of death has been confirmed, although fellow Heatwave band member Billy Jones told Dayton.com that Wilder died in his sleep.

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Wilder, who was born in Dayton, Ohio, formed Heatwave in 1975 in Germany with his brother, Johnnie Wilder Jr., who was serving in the Army. The duo subsequently enlisted songwriter/keyboardist Rod Temperton, drummer Ernest "Bilbo" Berger, bassist Mario Mantese, and guitarists Eric Johns and Roy Carter.

In 1976 the group released their debut album, the platinum-plus Too Hot To Handle, which peaked at No. 11 on the Billboard 200. The album spawned the hits "Boogie Nights" (No. 2) and "Always And Forever," both of which attained platinum status. Heatwave's sophomore LP, Central Heating, hit No. 10 on the strength of the Top 20 hit "The Groove Line." The group's third album, 1980's Hot Property, was certified gold.

Moving into a new decade, Heatwave released 1980's Candles and 1982's Current. By then, the group had lost Mantese, Wilder Jr. and Temperton, who at that point was emerging as a go-to songwriter for the likes of Michael Jackson, George Benson and Michael McDonald, among others.

Keith Wilder revamped Heatwave for 1988's The Fire, and kept the band alive as a touring entity into the '90s. While Wilder continued to tour in recent years, he was forced to retire from the road after suffering a stroke in 2015.

Wilder scored two nominations with Heatwave at the 20th GRAMMY Awards: Best Arrangement For Voices for "All You Do Is Dial" and Best R&B Vocal Performance By A Duo, Group Or Chorus for "Boogie Nights"

"Johnnie was a MONSTER singer whose harmony game is unmatched," said Questlove in an Instagram post. "No REAL singer worth their grain of salt NEVER denied his mastery."

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