The 21-year-old model, who is vacationing in Barbados for the holidays this week, hit the beach in a two-piece bikini that showed off the inking written across the skin under her modesty, reported E! online.
The tattoo appears to read 'Don't Worry Be Happy', a hit 1988 Bobby McFerrin song.
Delevingne's tattoo is very reminiscent of her good friend Rihanna's Goddess Isis inking, which she got last year in honor of her late grandmother.