Question: does whoopi goldberg really sing in sister act

Answer: Yes, The film's soundtrack was released in conjunction with the film, and contained the musical numbers performed by actors in the film itself, pre-recorded songs that were used as part of the background music, and instrumental music composed by Marc Shaiman for the film. The soundtrack album debuted at #74 and eventually reached #40 on the Billboard Top 200 Albums Chart where it charted for 54 weeks. The album received a Gold certification from the RIAA for shipment of 500,000 copies on January 13, 1993.