Sister Act features musical arrangements by a ninety year old American composer and lyricist.
Marc Shaiman ( born October 22 , 1959 ) is a Grammy , Emmy , Tony winning , and multi Oscar nominated American composer and lyricist for films , television , and theatre . Sister Act . Featuring musical arrangements by Marc Shaiman , the film stars Whoopi Goldberg as a Reno lounge singer who has been put under protective custody in a San Francisco convent of Poor Clares and has to pretend to be a nun when a mob boss puts her on his hit list .