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Otis Hart

Updated at 5 p.m. ET

Scott Walker, a pop singer who gave up stardom to carve out one of the most original and uncompromising careers in modern music, died Friday. He was 76. His record label, 4AD, announced Walker's death on Monday morning and later told NPR that the cause of death was cancer.

Walker was best-known for his work with blue-eyed soul trio The Walker Brothers in the 1960s, but it was his late-career trilogy of challenging art-rock albums that defined his reputation as one of avant-garde music's most electrifying auteurs.

Dick Dale, the surf rock pioneer who took reverb to new levels, died on Saturday night. He was 81. The guitarist's health had declined over the past 20 years due to a number of illnesses, including diabetes, kidney disease and rectal cancer. The news was confirmed to NPR by Dusty Watson, a drummer who worked and toured with Dale between 1995 and 2006, who says he spoke with Dale's wife, Lana Dale. No cause was given.

Keith Flint, a provocative frontman of British dance act The Prodigy who helped bring electronic music into America's mainstream, has died at the age of 49.

No cause of death was confirmed, though The Prodigy's Liam Howlett wrote on Monday morning that "our brother Keith took his own life over the weekend."

Updated Saturday 4:15 p.m

Nelly, the rapper behind hits "Hot In Herre" and "Ride Wit Me," was arrested Saturday morning for alleged sexual assault during a tour stop in Washington state.

The Auburn Police Department said in a statement that a woman called 911 at 3:48 a.m. Saturday and said she was assaulted by Nelly, whose given name is Cornell Haynes Jr. After a police investigation, Nelly was taken into custody an hour later.

Walter Becker, co-founder of Steely Dan, died Sunday at the age of 67, according to his website.