It’s Fergie, from the Black Eyed Peas!
She was born Stacy Ann “Fergie” Ferguson in California in 1975.
“Dear little Stacy, one day you’ll be 50 and you’ll be proud of yourself. You won’t have it all figured out, but you realise… who does?” she wrote in her letter.
“Success really is in the journey, and true happiness can be found in the smallest simple moments. Keep loving deeply with all your heart, and keep working on yourself. It always all makes sense later. I love you.”
She added a poignant message to her son, who she shares with ex Josh Duhamel, and wrote: “I also could not acknowledge this milestone without including my son Axl Jack, the sweetest love I’ve ever known.”
“You make me want to be a better human every day. Onward and upward🎂🎂.”