Representatives for the 59-year-old singer say she underwent successful kidney transplant surgery. Cole will postpone her summer tour as she recovers.
The daughter of the late Nat King Cole has been receiving dialysis three times a week since September. She still continued her concert tour in support of her latest album, "Still Unforgettable."
The Grammy-winner announced she was diagnosed with hepatitis C in February 2008. Her kidneys failed after treatment and she had since been seeking a donor.
Copyright 2009 The Associated Press.