A double-dose of desire right now as actress Joanna Krupa and her younger sister Marta Krupa poses for Ralph Magazine in some of the tiniest bikinis I have ever seen! Joanna (the blonde one) has appeared in films like the Planet of the Apes remake and TV shows like CSI and Las Vegas. Her younger sister Marta (the less blonde one) has shown up on reality TV shows like Mind of a Model and Model Dating: Hawaii. I can’t really decide on who the hotter one is. But then again, why choose when you can have both!