How did Ariana Grande celebrate her 21st birthday? Thu-26-Jun-14 18:29 Share this By Steph Monks The babe that is Ariana Grande turned 21 today. And to celebrate, her and her mates had a day out at Disney World! She tweeted, 'Spending my last few days as a non 21 year old in one of my favorite childhood places with my favorite people.’ She even dressed in a Minnie Mouse-inspired outfit. spending my last few days as a non 21 year old in one of my favorite childhood places with my favorite people 👩🎂🌌 pic.twitter.com/LOeHSh9YBB— Ariana Grande (@ArianaGrande) June 25, 2014 You May Also Like Ariana Grande releases steamy retro styled video for 'Problem' Which pop star broke her toes slipping on dog wee? Ariana Grande - Problem (Lyric Video) Become a fan of The Edge on Facebook and on Twitter .