Answer
"It Must Have Been Love" by Roxette topped the Billboard Hot 100, becoming their only number-one hit in the United States. The song was featured in the 1990 romantic drama film "Pretty Woman," starring Julia Roberts and Richard Gere, and its popularity soared after its inclusion in the film's soundtrack. The song's catchy melody, heartfelt lyrics, and powerful vocals resonated with listeners, making it a timeless classic.