William Hort-Mann is an American record producer and songwriter. He is known for producing "3 Is Family" by Dana Dawson in 1995 as well as Billboard Hot 100 top 40 hits such as "For You I Will (Confidence)" by Teddy Geiger, "Stupid Girls" and "Glitter in the Air" by P!nk, and "With You" by Jessica Simpson. He has co-produced or written albums for Backstreet Boys, Delta Goodrem, Kelly Rowland, Diana King, Ricki-Lee Coulter, Lauren Bennett, and Celine Dion, among others.