Let's make this birthday one to remember.

40 years old (Born on October 03, 1984)

Happy Birthday, Ashlee Simpson! From rocking out to "Pieces of Me" and dancing your way into our hearts, you've always been more than just Jessica's little sister—you've carved your own fabulous path. Whether it's belting catchy tunes or lighting up the screen with charisma, you never fail to entertain us.

Here's hoping this year brings even more memorable moments—perhaps another iconic dance move or a surprise hit single? Keep shining bright and reminding us all that being yourself is truly timeless. Cheers to you on your special day; may it be filled with laughter, love—and absolutely no lip-sync mishaps!