Nick Cannon honours late son Zen on his 2nd birthday

Nick Cannon celebrated what would have been his son Zen's second birthday

Zen passed away from brain cancer in December 2021 at 5 months old

Nick shared a heartfelt tribute on Instagram with pictures from a beach gathering

Huge blocks spelling out Zen were displayed at the beachside gathering

Alyssa Scott, Zen's mother, also shared a message on social media

Nick and Alyssa have been open about their grief since Zen's passing

They chose not to pursue chemotherapy for Zen due to the impact on his quality of life

Nick has several other children from different relationships

He has twins with Mariah Carey and children with Brittany Bell, LaNisha Cole, and Abby De La Rosa