Sydney Sweeney shares a racy photo of herself to promote her lingerie brand, Syrn.In a series of photos posted on Instagram, the 28-year-old actress posed for a mirror selfie in a white bra with little pink floral details on it, and a pastel green button up over it, left unbuttoned.She paired the look with matching white underwear, which were poking out from under her pastel green shorts.The actress posed alongside model AmeĢlie Tremblay, who sported the yellow version of the bra Sweeney was wearing, and accessorized her look with a matching pastel pink set, which she buttoned up halfway.Sweeney posed in her lingerie brand with her friend.(Sydney Sweeney Instagram)SYDNEY SWEENEY DOUBLES DOWN WITH AMERICAN EAGLE AFTER CONTROVERSIAL 'GREAT JEANS' CAMPAIGNBoth Sweeney and Tremblay are all smiles in the photos, as they pose with their hands in the air, and jump around and dance to "Everybody Talks" by the Neon Trees in the video."Cosmo and Wanda think they slick ...