The 'Good 4 U' hitmaker celebrated her milestone birthday ... cake. The musician also posted a throwback snap of herself as a child wearing a handmade birthday hat. Olivia Rodrigo/Instagram "21!!!

By Hannah Dailey The Spicy Pisces is officially 21. And after celebrating her milestone birthday Tuesday (Feb. 20) with a huge birthday cake and a party with friends, Olivia Rodrigo shared her ...

Millie Bobby Brown rang in her 21st birthday ... and sand-covered cake. At the end of the video, Bobby Brown mouths the lyrics “except for the fact it was my birthday, my stupid birthday ...

To round off her epic accomplishments, she celebrated her 21st birthday with a festive star ... at California’s Kia Forum and brought her a cake, prompting the crowd to sing “Happy Birthday” before ...