But men's obsession with shapely butts has remained strong ever since—and Kim. Fit girls show off tight sexy butts on Fitness Rooms. RELATED: 18 Moves to Tone Your Butt, Thighs, and Legs. Buttocks augmentation: It started in Latin America, crept into Hollywood, invaded. Lani Blair - See her Latest Pics on All Hip Hop ModelsAll Hip Hop Models.