Fergie celebrated a special occasion by sharing rare photos of her son Axl, whom she shares with her ex, Josh Duhamel. The former couple's son, Axl, just turned 12 and Fergie posted a rare carousel of throwback photos via her Instagram on Friday, August 29, to commemorate the birthday. "Axl Jack, the preteen. ," the Black Eyed Peas singer, 50, captioned the post. "I am so proud to see how independent you're becoming and what a kind human you are. Discovering everything you're into and watching you grow brings such joy... I feel so lucky to be your mom.