HeyBaby of California Scrunch Butt Bikinis are the latest style for bikinis. Scrunch Bikinis have the coverage of the Rio back but add a little cute right where it counts. They come in Rio back, Tie side, Low Rise, and Strappy. Shop Swim Suit Separates by Style. Mix and Match your favorite Bikini styles. Hot Shorts, Micro and Mini Bikini styles, Stationary Tri-Tops and Adjustable, Thong Bikini bottoms and Rio back as well. See our style guide for your perfect fit.