Billie Eilish Shows Off Her Underboob Tattoo in a Graphic Bikini Top

If there's anyone you can count on to achieve nostalgic style, it's Billie Eilish. The Grammy-winning singer stayed true to her '90s-inspired fashion sense as she enjoyed a late spring afternoon on June 11. Eilish still managed to leave fans in a frenzy with only half of her outfit showing while casually posing for her friend Annabel Zimmer's Instagram photo dump. Appearing to be poolside, the young star wore yet another edgy look — a graphic string bikini top from Miaou with an extreme plunging neckline, giving us a rare glimpse of her script tattoo. Eilish teamed the chest-baring top with a pair of black Versace sunglasses with thick tints and the brand's signature gold logo embossed at the sides. She also accessorized with an assortment of jewelry, including silver necklaces and pearl earrings, with her hair slicked back in a casual bun to achieve maximum relaxation.

The 21-year-old singer is no stranger to rocking vintage trends. Eilish has gravitated to more unconventional ensembles, delivering a new vibe with every appearance while sticking to her dark sartorial signature. She recently wore a sheer dress while posing in the rain for a campaign for her new fragrance Eilish No. 2, reminding us of the naked Simone Rocha look she rocked at the 2023 Met Gala. She's also developed an affinity for shamelessly donning polarizing combinations, including a red and white jersey and micro shorts over fishnet tights, and a leopard bra and black pleated miniskirt over gray baggy jeans. Eilish has also nailed modern-day trends, switching things up in April 2023. For an Easter celebration with ex-boyfriend Jesse Rutherford, she effortlessly embraced the soft-girl aesthetic with a Yuhan Wang floral-embellished dress and a pair of Nike Air Force 1s. As the "Happier Than Ever" singer continues to make her mark, click through for a closer look at her summer-friendly ensemble.