Majors and Minors begins in September, and will see 12 young hopefuls competing for the opportunity to win a recording contract with RCA/Jive.
American Idol runner-up Lambert and 'Girlfriend' singer Lavigne will now join the likes of Sean Kingston, Brandy, Leona Lewis and Ryan Tedder as celebrity mentors on the show.
Majors and Minors follows a different format to traditional music reality shows as no contestants will be voted off.
Instead, all 12 of the contestants will be mentored over the course of 15 weeks until a valedictorian winner is named in the finale.
"It's not about the drama," executive producer Timothy Bogart explained to Billboard. "We have found children who are artists already and we watch their journey."
Majors and Minors will premiere on Hub TV on September 23.
Watch the video for Avril Lavigne's recent single 'Smile' below: