Stefani's youngest son, Apollo, was born on 28 Feb., 2014. Apollo gets the middle name Flynn from his maternal grandmother's maiden name and Bowie from his paternal grandmother's maiden name.
On his ninth birthday, Stefani shared a selection of photos and videos featuring her and Apollo with Shelton. "My world is so much bigger with u in it, happy birthday, apollo ♥️♥️ i love u so much," she wrote on Instagram.