In the smooth jazz format his number one hits include "Our First Dance", "Do You Feel What I'm Feeling", "Mambo 2000", "Tamara", "Still in Love", La Dolce Vita", "Promises", "Take Out Dreams", "Tears in Heaven", "Another Goodbye", "Tell Me All Your Secrets", "You Are the One", and "Turn Out the Lights". Warren and his wife Tamara VanCleef-Hill wrote and produced the song "Shelter from the Storm". He was featured on the song "Tell Me What You Dream" by Restless Heart and "Baby I Love Your Way" by Big Mountain. He appeared on the television show Top of the Pops on the BBC in England. Hill founded a smooth jazz cruise in 2004. He is also the host and owner of the Cancun Jazz Festival, has established his brand of instruments, and co-founded the label, Songbird Records.