Gwen Stefani’s Son Apollo TWINS With Blake Shelton at Disco-Themed Birthday Party. Gwen Stefani's youngest son Apollo celebrated his tenth birthday in style, twinning with stepdad Blake Shelton at a disco-themed party. The family went all out for the celebration, with Gwen rocking a floral top and fur coat, while Blake wore a Hawaiian shirt and curly wig. Apollo went for a similar look to his stepfather, with lots of energy and fun at the party. The event also celebrated Gwen's mother turning 78 and her younger brother turning 50. Gwen is also putting out new music, recently releasing a collab with her husband. Despite the challenges of finding time to make music as a parent, Gwen is excited about her new projects and the creative process.