Boozin' It Up!

Lauren Conrad to’ it up in Vegas this past weekend!

Our Sin City spies tell us that she was boozin’ it up from club to club, rounding the weekend off at Body English (above) at the Hard Rock Hotel.

L.C. was kickin’ it with Hills villain Lo Bosworth, but noticeably absent was estranged friend Audrina Patridge.

The pair did see each other at a friend’s birthday party earlier in the weekend, but – we’re told – they barely spoke and their few interactions were “strained.”

Oh, the dramz!