VIDEO : Amber Rose & Wiz Khalifa Celebrate Son's 4th Birthday With Superhero-Themed Party

Amber Rose and Wiz Khalifa are committed co-parents. The exes threw a joint birthday party for their son Sebastian on Sunday, honoring the 4-year-old's big day with a superhero-themed backyard bash. Both Amber and her rapper ex-husband documented the festivities across social media, including multiple videos shared on Amber's Instagram story. He's our beautiful child, and he's super awesome," Amber told the crowd in one clip, before turning her attention back to Sebastian. "Happy birthday, pumpkin!"