Lauren Conrad's arch frenemy Kristin Cavallari looked every inch the IT girl on Alexa Chung's talkshow this week

Kristin was the girl in Laguna Beach everybody loved to hate. She lied, she back-stabbed and she stole boyfriends.

And now she's back. And as much as we hate to admit it she is looking rather more stylish than we remember. The tiny bikinis and short skirts she wore in Laguna have been ditched here for a blazer, nautical dress and Alexander Wang tote bag. Classy!

She also made an appearance on Alexa Chung's talkshow this week.

Alexa is known for her... rude distinctive style of interviewing, as we saw when she interviewed Demi Lovato recently. Check it out here.

But we bet Kristin Calamari (oops we meant Cavallari not fried squid) gave Alexa a run for her money!

Check her standing her ground in the trailer for Season Six of The Hills.

OK we're actually scared. What do you think of Kristin and her new classy look?