The 25-year-old singer and actress and the model, also 25, dedicated sweet posts to Swift on her birthday Wednesday.
"I'm glad you were born. You write all the thoughts some aren't able to articulate. (ME!)," Gomez captioned a video of herself and Swift voguing for the camera.
"Thank you for giving a voice to this world that is authentic and inspiring. I wish some knew how big your heart actually is.. it's fierce, bold and freaking wild with light. I'm glad you protect that. Love you @taylorswift," she added.
Kloss posted a throwback photo on her own account of herself and Swift looking like sisters.
The picture appeared to be a behind-the-scenes shot from the pair's photo shoot for the March 2015 cover of Vogue, according to People.
"Happy happy birthday @taylorswift!" Kloss wrote, adding a star emoji.
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