The third-season finale of The Hills on December 10 will be only a small part of a big two-day, season-ending event that MTV is planning for its reality TV hit.

MTV will present The Hills Finale: Live in Hollywood, broadcast live from L.A. hot spot Area, beginning at 8 p.m. The finale itself airs at 10, followed by a live after-show, during which Lauren Conrad, Whitney Port and Audrina Patridge will answer questions, then make "an announcement that will leave fans wanting more."

Audrina Patridge, Whitney Port and Lauren Conrad of The Hills.

The season finale celebration will actually begin the day before, when MTV airs a special called The Hills: Lauren Looks Back, beginning at 12 p.m. ET.

Described as a "video scrapbook" of Lauren Conrad's life from her time at Laguna Beach High to her life today, it will feature LC talking about past friendships and boyfriends, from Stephen Colletti to Jason Wahler to Brody Jenner.

This is one event not to be missed on The Hills!

We just are waiting for Spencer Pratt and Heidi Montag to crash the stage during the after-show and hose down LC and pals with water guns. Or something.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.