Peter Eric Zizzo (born February 22, 1966) is an American songwriter, music producer, musician and writer. Zizzo is also a stage and television actor, having appeared in the Showtime series Billions in 2021. Zizzo has written hits for artists such as Celine Dion, Avril Lavigne, Jennifer Lopez, Marit Larsen, O.A.R, Jason Mraz, Donna Summer, Diana Ross, M2M, Cliff Richard, Clay Aiken, Howie Day, Kate Voegele, Jackie Evancho, Pixie Lott, Vanessa Carlton, and many others. He has been considered instrumental in developing the careers of artists Avril Lavigne, Vanessa Carlton in the US, and Pixie Lott in the UK. Recordings of his songs have collectively sold in excess of 100 million copies worldwide.