Olivia Dunne, the American gymnast, turned 21 recently
She celebrated her birthday with some stunning looks that left her fans in awe
She shared pictures of her birthday looks on her Instagram account
One of her looks featured a black dress with a thigh-high slit and a plunging neckline
Another look included a white crop top and a matching skirt with a thigh-high slit
Her fans and followers flooded her comments section with birthday wishes and compliments on her looks