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!!!

The Zolciak-Biermann family can apparently laugh about Ariana’s DUI bust now that the reality star is officially 21. The second ... age Monday night with a birthday cake decorated with a photo ...

The second eldest daughter of Real Housewives of Atlanta star Kim Zolciak-Biermann commemorated her 21st birthday on Oct. 17 with a cake decorated with her mugshot. The photo was taken after ...

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 ...

She graduated Harvard with a dual degree in classics and political science, celebrated her 21st birthday ... gotten a cake with a mock-up Teen Vogue cover of her for her 20th birthday last ...