What's the main rule of reality show competitions?

Take it from Project Runway's Santino Rice, Top Chef’s Marcel Vigneron, and more than 50 other past contestants. It's not to make friends -- it's to win!

Check out a funny montage of past fan favorite contestants from these shows and others as they put in their own words how friendship isn’t their No. 1 reality show priority.

Tell Us: Who's your favorite reality TV star of all time?