RIP, Donald "Duck" Dunn

The incomparably rhythmic bass player Donald "Duck" Dunn, who was the soul of Booker T's rhythm section and the heart of the Blues Brothers' band, is dead. He died on tour with Steve "The Colonel" Cropper, also of the Blues Brothers, in Japan. He was 70.

His friend and fellow musician Steve Cropper, who was on the same tour, said Dunn had died in his sleep.

"Today I lost my best friend," Cropper wrote on his Facebook page. "The World has lost the best guy and bass player to ever live".

Miho Harasawa, a spokeswoman for Tokyo Blue Note, the last venue Dunn played, confirmed he died alone early Sunday. She had no further details.

Booker T bassist Donald Dunn dies in Tokyo aged 70