Apparently Hayden Panettiere thinks she's the next Julia Roberts or something, because everywhere she goes she's being an absolute pain in the ass. Her parade of bitchiness started in Hawaii...

The 19-year-old Heroes star -- who recently split with Milo Ventimiglia because of her club-going ways -- was testy when she first stepped on the red carpet at a fundraiser benefiting the Rehabilitation Hospital of the Pacific Foundation Sunday in Honolulu.

"Back up!" she yelled at photographers.

After posing for photos, she brushed by reporters. A female television reporter touched her shoulder and asked, "May we talk with you, Hayden?"

Miffed, the actress jerked her head around and screamed, "Don't you ever touch me!"

She then icily asked a red carpet handler, "Oh, am I supposed to do interviews?"

Approaching various media outlets, she snapped again: "You all make my life miserable" and refused to answer any questions. (Us Magazine)

Smart. Surely if you treat the press like crap they'll write nothing but great things about you in the future. Then, upon returning to Los Angeles to continue filming the current season of Heroes...

Hayden, 19, is trying to get Milo, 31, kicked off of the show, according to a mutual friend.

“She refuses to be on the set at the same time as him,” the pal tells OK!. “She is making it difficult for everyone involved.” (OK! Magazine)

Someone really needs to put this little troll in her place. If you're going to parade around acting like hot shit, you'd better have something to back it up. Let's see, Heroes is absolutely tanking in the ratings, and she's never once starred in a movie that made solid returns at the box office. Let's hope the producers of Heroes write her off the show immediately. If she doesn't watch her attitude she could end up in movies like Leprechaun 6: The Return... playing the leprechaun, of course.

Considering that Hayden Panettiere was recently spotted making out with Jesse McCartney, it's hardly shocking to hear that she and Heroes co-star Milo Ventimiglia are officially over. US Magazine reports:

"It was a lifestyle conflict," a source close to the couple tells Us, adding that the split happened within the last week. "They were in very different places."

The source tells Us that Panettiere, 19, "is young. She likes to go out in the Hollywood scene and that's not his style."

Ventimiglia, 31, "has been concentrating on work on his production company [Divide Pictures]," the source adds.

Different places? You don't say. I'm going to take a shot in the dark here and guess that the 12-year age difference between them could be responsible. Here's a little tip for guys like Milo who are into jail bait: remember, when she isn't even 21 yet and you've been drinking legally since she was in grade school, she's probably not ready to settle down just yet. Or maybe Hadyen woke up one day and realized she could no longer stand Ventimiglia's stupid crooked smile. What's up with that? Is he hoping to be cast as the next Bond villain?