The Hills wrapped up this season with familiar themes from recent episodes - from backstabbing to boyfriend stealing! While Lauren Conrad bid adieu to the show, this episode marked the return of former ‘Laguna Beach’ star Kristin Cavalleri (gasp!). Next season promises to be more exciting than ever. Until then, check out the most dramatic moments and the fabulous ensembles in our Hills episode 510 gallery!

Photos courtesy of MTV.

Heidi breaks the news to Stephanie that she's chosen her sister, Holly to be maid of honor.

Heidi, Stephanie and Audrina laugh and reminisce at Heidi's bridal shower.

At dinner with Brody, Lauren expresses her reservations about attending Spencer and Heidi's wedding.

When Brody runs into Spencer, he's shocked at how much his friend has changed.

At People's Revolution, Lauren tells Kelly Cutrone that she's ready to be more independent when it comes to her career.

At Heidi and Spencer's dinner rehearsal, Stephanie makes a heart-felt speech.

The evening turns sour when Holly throws a potato that stains Heidi's brand new purse.

At Lauren and Lo's, the girls have one last party before moving out of their house.

On Heidi and Spencer's wedding day, Heidi's shocked when Lauren enters the room.

Lauren tells Heidi that she was meant to attend the wedding - after all, they were best friends.

'The Hills' gang is surprised when Kristin Cavallari makes an appearance at Spencer and Heidi's wedding.

Kristin catches the bouquet, and Heidi tells her she's next!