Happy birthday, Karlie Kloss! But don't take it from us, take it from Echosmith's lead singer Sydney Sierota. The "Cool Kids" singer uploaded this black-and-white photo of herself, Karlie, their mutual bestie Taylor Swift, and actress Kate Hudson. She even revealed in her caption that Karlie is a bomb-dot-com cookie baker!
Make sure to leave your HBD wishes for Karlie in the comments below!