Mary Kate Olsen and boyfriend Nate Lowman made the party rounds at The Art Basel Convention in Miami, and left quite the odd impression in their wake. Partiers noted that Mary Kate wasn’t looking very healthy and started a hiss-fest fight with Kirsten Dunst.

more nasty news after the hop…

 
 

Mary-Kate Olsen has defied biology and may be pregnant. Sources are claiming Mary-Kate and artist boyfriend Nate Lowman are expecting their first childHey, if Nicole Ritchie can do it, anyone can, right? The frail starlet was seen looking normal-sized, which means she MUST be knocked up! This seems to be run-of-the-mill Hollywood logic—a few extra holiday pounds, and viola! A child is born!

more baby news after the jump…

A “source” told The Post Chronicle: