Karlie Kloss just celebrated her 23^rd birthday and people were left scratching their heads by the Instagram message Taylor Swift posted for her friend.

The photo features Swift’s boyfriend Calvin Harris and the birthday girl, Karlie Kloss cooking in the kitchen. The caption: “Some of my best memories have been with this girl, laughing in the kitchen. Happy Birthday to the ray of light that is @karliekloss.”

The seemingly normal photo was a puzzle to the readers as the birthday girl, and for whom the message was dedicated to, was in the background. People thought it made no sense at all.

Some of my best memories have been with this girl, laughing in the kitchen. Happy Birthday to the ray of light that is @karliekloss.

A photo posted by Taylor Swift (@taylorswift) on Aug 3, 2015 at 2:32pm PDT

Victoria’s Secret model, Karlie Kloss on the other hand, appreciated the gesture and graciously responded to Swift’s greeting.

Asked about their friendship in an interview with Glamour Magazine, Karlie Kloss disclosed how she and Swift became friends. “Taylor and I met at the Victoria’s Secret Fashion Show two years ago. [Model] Lily Aldridge introduced us. She was like, ‘OK, you two are kindred spirits. How have my two nice American friends never met?’ And that was it….. Our friendship is the same as yours and mine. Many of my closest friends are traveling all the time, so it takes constant effort—texting, FaceTiming—on all ends to maintain close relationships,” Kloss admitted in Glamour Magazine.

Taylor Swift on the other hand gets candid about her love for her girl best friends in her interview with Vanity Fair. The “Bad Blood” singer has a circle of A-list friends including Kloss, Gigi Hadid, Cara Delevingne, Selena Gomez, Lena Dunham and Ellie Goulding.

On the issue of dating the same men her friends have dated, Swift shared her thoughts, “It’s almost like the sisterhood has such a higher place on the list of priorities for us.”