On the last episode of The Hills, new rommies, Lauren, Audrina and Lo move into their new 2 million dollar Hollywood Hill home.¬† What’s a girl to do at that point?¬† Throw a house warming party of course!¬† Lauren informs the girls that Stephen Colletti is in town and will be coming to the party.¬† In turn, Audrina lets the girls know that her ex Justin Bobby will be attending as well.¬† Go to MTV.com for the rest of the scoop on what happens.