PREVIEW

Taking to Instagram on Thursday, the former Black Eyed Peas singer posted a photo of herself as a girl, a screenshot of her name on Billboard's list of Top Women Artists of the 21st Century, and a recent snap of her 11-year-old son Axl Jack. In the accompanying message, Fergie - real name Stacy Ann Ferguson - reflected on how far she's come. "I honestly didn't know what to post to mark this landmark number, so I started with a letter to my younger self.”