Louis-Philippe Celestin (born August 30, 1994), better known by his stage name Lou Phelps, is a Canadian rapper and producer from Saint-Hubert, Quebec.

He is a member of the Canadian Hip hop duo The Celestics alongside his brother Kaytranada.

Lou Phelps began his career as Louie P with The Celestics. They released their debut project titled Massively Massive in 2011 In 2014, Lou Phelps, along with Kaytranada, released a project titled Supreme Laziness under the moniker The Celestics. On April 20, 2017, Lou Phelps released his debut project titled 001: Experiments. The project was produced entirely by Kaytranada. The project featured guest appearances by Bishop Nehru, Innanet James and Kallitechnis.