Josh Duhamel wished his wife FERGIE a happy birthday by sharing a heart-warming photograph of their baby son, Axl. The Black Eyed Peas singer turned 39 on Thursday (27Mar14), and her husband of five years declared his love for her by showing off their seven-month-old son. Duhamel took to Instagram.com to post a photo of the tot sitting in his dad's lap looking straight into the camera, while the actor held up a sign reading "Happy Birthday Mommy!!!" Fergie later took to the photo sharing website to post a picture of her one-of-a-kind birthday cake, complete with red frosting, rose decorations and a shirtless photo of her hunky husband from his film, Win a Date With Tad Hamilton. She wrote the caption, "Thank u (sic)... for my dope bday (birthday) cake!!!!! LOL (laugh out loud). Tad Hamilton."