Dec. 13 marked a special day for Taylor Swift [1]: her 26th birthday! On Sunday, the singer kicked off her celebration by posting the most adorable throwback snap from her childhood on Instagram, writing, "Today I begin my 26th year of freaking out over stuff." Selena Gomez [2] also chimed in and shared a sweet photo collage of her own, while Gigi Hadid echoed the same sentiments with a GIF. Jaime King, Karlie Kloss, Gwyneth Paltrow [3], and Blake Lively [4] also gave Taylor sweet shout-outs on social media.

The singer is currently on hiatus after recently wrapping her 1989 world tour and recently told Vogue Australia that she thinks it's time to be out of the spotlight [5] for a bit. However, Taylor has been very active on social media. Earlier this month, she shared a series of cute photos from her trip Down Under, including a few with kangaroos and pal Blake [6]. Keep reading to see all the sweet birthday messages, and then look back at a full history of all of Taylor's relationships [7].

Blake Lively

"Blake wins at birthday pies. @blakelively I honestly can't stop laughing rn."

Blake Lively

"There's a reason ' #friendshipgoals ' was invented because of her. Thank you @taylorswift for the happiness you bring to not only everyone that knows you, but also to those who don't --you're the real deal. Happy Birthday!"

Jaime King

"Dear Tay- Tomorrow is your birthday and I will be in the air. This picture I took of you brings back the fondest of memories. It captures all of your beauty that I know, that the world knows, in one photograph. You have the uncanny ability to just get straight into the Soul's of us all in one shot. With your music, you grab the hearts of countless hearts & don't let go. As my sister, with your irresistible enthusiasm, un-f*cking unbeatable passion and true honesty, feels like home. To have changed the perception of female friendships (even in the smallest way) because somehow, in this crazy world where women want to hurt each other, we have a thoughtful group of friends where we have chosen to love each other through it all, and support our peers along the way & with open arms you bring this sisterhood to life Intimately and sincerely, I love you, I am profoundly proud of you, your Light is a rare and brilliant gift. Happy Birthday!!! (Your always sensitive, expository and teary eyed friend;) xo Jaime."

Selena Gomez

"I don't know life without you Taylor. Happy birthday!"

Gigi Hadid

"What a year, T! Love you, so proud and grateful to call you my friend. You are beyond. Happy Birthday - can't wait to celebrate soooon."

Karlie Kloss

"Happy 26th birthday to my cookie baking, road tripping partner in crime. Looking forward to a lifetime of adventures ahead together. I hope you have the most magical day and can't wait to celebrate together."

Gwyneth Paltrow

"Happy Birthday #taylorswift. Thank you for being the kind of #girlboss that you are. And for being Apple Martins biggest inspiration."