Kristin Cavallari is back on TV, stretching her acting range by replacing Lauren Conrad on The Hills. It must be great for her to never be able to escape Lauren's shadow. Anyway, looks like the geniuses at MTV and/or her publicist couldn't think of a better way to promote this uninteresting news than with these ridiculously staged Kristin Cavallari bikini pictures. At least they made sure she showed off her ass. What I really want to know is who is her super-cute Brunette friend in the green bikini?