It looks like Karlie Kloss is the newest celebrity to rock the rainbow hair colour trend . . . but not for too long. The 23-year-old model shared a photo of her turquoise-accented locks on Instagram captioned, "mermaid vibes on set." While that means that she'll probably go back to being a blonde after her shoot (those blue pieces look like clip-ins!), we're currently obsessing over how good she looks with the quirky colour. She's giving off aquatic-goddess vibes!