Listen to It Must Have Been Love (from "Pretty Woman") online. It Must Have Been Love (from "Pretty Woman") is an Unknown language song and is sung by Movie Soundtrack All Stars. It Must Have Been Love (from "Pretty Woman"), from the album 65 Best Songs from Chick Flicks, was released in the year 2013. The duration of the song is 4:30. Download Unknown songs online from JioSaavn.