She dated pop sensation Justin Bieber in 2014 and Yovanna Ventura showed just what caught his eye when she hit the beach in St Barts on Saturday.The 20-year-old struggled to contain her ample assets in a yellow frilly bikini top as she frolicked in the sea with a mystery man. She teamed the sexy number with a black thong which showed off her flawless posterior as she waded through the surf.