Luther Vandross, the R&B crooner whose understated and sophisticated singing style made him a superstar died Friday. He was 54.

Vandross died at John F. Kennedy Medical Center in Edison, N.J., said hospital spokesman Robert Cavanaugh.

“Vandross died with his friends, family and medical support staff at his side,” said Cavanaugh. “Luther was deeply touched by all the thoughts and wishes from his fans.”

At the time of his stroke, J Records label mate Alicia Keys issued a statement about Vandross. “I just (wanted) him to wake up and smile that smile,” Keys said. “Sing that song. My prayers go out to his family.”