New BFF Alert: Heidi & Audrina:!!!!

This will certainly stir things up on The Hills.

It has TROUBLE written all over it – and we love it!

Lauren Conrad‘s former friend, Audrina Patridge, was spotted having lunch while being filmed for their reality show this past wekeend.

But guess who was with her at lunch???

None other than L.C. frienemy Heidi Montag!!!!!!!

DRAMA!

Audrina and Heidi met up for some coffee.

And with the recent news of L.C. hooking up with Audrina’s ex, Justin Bobby, circulating the internet, we bet Heidi had a lot of advice to offer.

Oh to have been a fly eavesdropping on that conversation!!!!!!

[Image by James Breeden/Nate Jones via Pacific Coast News Online.]