Roberta Flack, Singer Selection information (incomplete), which is not listed in the printed concert program, has been added as per the review published in Billboard. According to the review, the "second set" featured "horn augmentation directed by Donny Hathaway". The accompanying musicians (other than Donny Hathaway) are not identified. Glassenberg, Bob. “Roberta Flack, Carnegie Hall, New York.” Billboard, 22 May 1971, p. 22. 1971-05-07T20:30:00