Who do you think should replace Lauren on 'The Hills'?

'The Hills' television series on MTV's fifth season ends next sunday, May 31st, at ten O clock p.m. The hour long season finale will feature Heidi Montag and Spencer Pratt's long awaited wedding, and we will once and for all say goodbye to Lauren Conrad as 'The Hill's' leading star. So, the question is, what do you want to happene? Should Audrina take the lead role, and be the new main girl? Should Heidi? Should Stephanie, or Lo be added as an official cast member? Or should Kristin Cavallari take the lead as the new main character on 'The Hills'? As you'll see, in the season finale this Sunday, Kristin, Lauren's arch enemy from 'Laguna Beach' is back, and will be added to 'The Hills' cast. So what do you think should happen? Who do you think should replace Lauren on 'The Hills'? I'm very interested to see what everyone says.