Speak Now singer turns 21 on Monday (December 13). By Jocelyn Vena Taylor Swift Photo: Hellmuth Dominguez/PacificCoast Taylor Swift turns 21 on Monday (December 13), and she is getting some birthday wishes from many of her celebrity pals, who took to Twitter to show some love to the superstar and send her attention in honor of the milestone. “Hey!! Today is my girlfrannn @taylorswift13’s 21st birthday!!!” Paramore leading lady Hayley Williams tweeted . “Holy heck. She’s all growed up. So blessed to know her. Tweet her some love!” Selena Gomez got in on the action too, writing to her pal , “Happy birthday @taylorswift13!!! I love you so much!!” Katy Perry also tweeted , “@taylorswift13 happy 21st gorgeous!” Perez Hilton had a shout-out for Ms. Swift, adding a Latino flair to his wishes: “@taylorswift13
