"Kanye West's song Hey Mama was the last tune the rapper's mother heard before she died from cosmetic surgery complications last year (Nov07), according to her own mother.

Concerns for her daughter's wellbeing prompted Jean Roberson to rush to Donda West's bedside after the professor failed to regain consciousness after eight hours of surgery.

To wake her, Roberson took out her cell phone and played the version of West's Hey Mama she had downloaded as a ringtone.

In an exclusive interview with U.S. Tv news show Access Hollywood, Roberson says, "I put the phone to her ear and said, 'Donda, listen... "Wake up, listen. Kanye's singing to you.'"

The patient eventually did come round and was wheeled out of surgery in "an executive chair".

Donda West died the following evening."