Rich Cronin, the former frontman for boy band LFO, known for the 1999 hit “Summer Girls,” died Wednesday, September 8, of leukemia. He was 35.

TMZ reports that the singer lost his long battle with cancer Wednesday afternoon after suffering a stroke. Cronin was first diagnosed with myelogenous leukemia in 2005 after complaining of exhaustion and headaches. He later established the Rich Cronin Hope Foundation to raise awareness for cancer treatment.

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