(masterpiece, best quality, ultra-detailed, photorealistic, 8k), full-body mirror selfie of a stunningly fit, 19-year-old girl. She has a lean, athletic physique with a flat, toned stomach and visible, defined abdominal muscles. Her long blonde hair is styled into two tight Dutch braids that hang over her shoulders. She wears large, fashionable tortoiseshell glasses and has a confident warm smile. She is dressed in a white and black horizontally striped, long-sleeved, knitted cropped sweater, cut very short to fully expose her tight midriff. She's wearing a pair of skimpy lacy black thongs, the thong is so tight her crotch, creating a deep, pronounced, and highly detailed camel toe, explicitly outlining the shape of her vulva through the fabric. The shot is taken in her sun-drenched bedroom, a bed with white linens and a fluffy pink blanket is visible behind her, along with a wall covered in a photo collage. The lighting is bright and natural, highlighting the contours of her body.