United Kingdom, March 27 -- Fergie has marked her 50th birthday by writing a letter to her "younger self".

The singer - who is best known for starring in the Black Eyed Peas - has taken to Instagram to share the letter with her followers.

Fergie - who turned 50 on Thursday (27.03.25) - wrote on the photo-sharing platform: "I honestly didn't know what to post to mark this landmark number, so I started with a letter to my younger self.

"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 realize .. who does? 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. I...