Spencer Pratt isn't the only person that Heidi Montag is divorcing. X17online exclusively has learned that Heidi's friendship with Jennifer Bunney is over.

A source close to Heidi tells X17online:

    "Heidi is trying to distance herself from Jen ... not even returning her calls. Ever since Jen has returned from Hong Kong, she's been calling Heidi non-stop asking about this summer's show. Heidi is definitely over her."

X17online spoke with Jennifer Bunney just yesterday where she told us that she's been accepted into the University of Texas Medical School. Bunney, who just returned from Hong Kong, is in The Lone Star State where she's meeting with the school's dean. Jennifer tells X17online:

    "I've decided that I may defer my acceptance into medical school because I'd like to get my MBA first. I want to make sure that when I get to med school I'll be Doctor Bunney. I'm moving to Hollywood next week so I'll most likely go to get my masters in the LA area. Plus, I want to be in Hollywood so that I'll be able to do the show with Heidi this summer. But for some reason she's not returning my calls. It's so hard to get a hold of her. I've heard that she may do a show in the UK, but this is the first I've heard about that. I think she would have told me if the show concept has been changed ... right?"

Uh ... wrong. If she's ignoring you these days, you're probably going to be kept out of the loop. May be a good idea to tell that dean of admissions that you accept! Our Heidi source tells us, "Since Jen went to Hong Kong, she has no idea that the whole game has changed. Heidi think Jen's five minutes have gone to her head."

As for Heidi, she recently tweeted:

    @karissashannon1 will be moving in my Malibu house this summer and will be filming our new show! We are going to have fun hot summer!

    @kristinashn1 Please come back to Malibu I miss you!!!!! We need to get our tan on! xoxo

    Please follow the hottest twins in the world @KristinaShn1 @karissashannon1 and my BFFS!!!!

Even though nothing is official yet regarding Heidi's supposed summer show in Malibu, looks like she's excited to start filming the twins. No, not those twins.

Sorry Bunney, looks like you've been replaced by two Playboy bunnies. Life can be so cruel sometimes.

**Update** We just got off the phone with Jennifer Bunney and she tells X17online exclusively:

    "I knew something was up because she honestly has not called me back. I think that is so messed up that I have to learn about my own friendship through the media. I'm not going to cry about it and to be honest with you, everything happens for a reason. This is just so shocking because I've been so supportive of her. I quit my job because she told me to. I was supposed to move in with her within the next couple of days. It's really not cool to be left in the dark. I'm still going to defer my medical school acceptance so that I can attend business school first. But I guess if the Shannon twins are joining the Malibu show, then it's not really the concept I was wanting to be a part of anyway. And as far as me 'letting my 15 minutes go to my head', whatever, the show hasn't even started yet. Well, maybe I'll try to get my own show."