HEIDI KEEPS FLAPPING HER PLASTIC LIPS

Us Weekly reports in their new issue:
In the explosive new trailer for the upcoming season of MTV's The Hills, it's evident the tension and drama between Heidi Montag and Spencer Pratt has escalated. "When we get back to L.A., I need you to move out... I gave up everything for you!" Montag declares. "I'm not the one who wanted to see other people!"

Did Pratt give his number to another girl – or worse?

Montag and Pratt open up exclusively in the latest issue of Us Weekly, on newsstands now, about how another girl rocked their relationship, what to expect from the new season, and the death of Montag's step-brother.

"Spencer and I have really had our ups and downs this past year," Montag tells Us. "I've definitely been betrayed by friends before, but I've never had a boyfriend do this to me."

She adds, "Spencer and I may differ on what it means to cheat."

Pratt, for his part, tells Us, "We're definitely on a roller coaster. I'm not too happy about a lot of things."

Montag and Pratt also reveal that Laguna Beach alum Kristin Cavallari was their matchmaker. "Kristin made it all happen," Pratt says. "She said to me, 'I know this girl who's so hot and perfect for you!'"