Dude, so how long did it take for this “serious relationship” to fall to pieces? A month? Two?

Sources are reporting that John dumped Jen.

“There’s been a bit of tension for some time,” says a source close to 30-year-old John. “They initially opted for a break, hoping a trial split might make them stronger. Sadly it doesn’t seem to have worked. John took the decision to end things as he felt he just wasn’t ready for the level of commitment that Jennifer deserved.”

Word is that Jen’s already got a new man — some sort of male model. Sigh. Isn’t she bored of the male models yet?

Miley Cyrus shows off her moves during a performance on Good Morning America.

Meanwhile, rumor is that Jennifer Aniston has approached Miley to team up on a movie.

Jen told a friend that she wants to play an overbearing stage mother to Miley’s rising singing star character.

“I approached Miley about it, and she thinks it’s a very cool idea,” she reportedly said.

She and Miley have had several chats about the film, and she’s already hiring someone to start writing the script, according to reports.

I’m not sure I buy any of this. Does Jennifer Aniston really want to admit she looks like she could be the mother of a 15-year-old?

I doubt it.

This is a fun little item from Page Six:

JOHN Mayer might have broken Minka Kelly’s heart when he left her for Jennifer Aniston – but he had the decency to call her before the news about them hit the press. A Kelly pal said, “Minka [above] received a call from John prior to the story breaking about his relationship with Jennifer. He apologized to Minka, ‘Sorry, but I’m really in love.’ ” She found that interesting as, “during his relationship with her, John mentioned, ‘I don’t really get this Jennifer Aniston thing.’ ” Mayer’s rep declined to comment.

Well, I’ll tell ya, John Mayer’s getting plenty of Jennifer Aniston’s thing these days.

He’s gonna get bored of her so quick.

I’d like to begin this piece by stating that I think it’s absolutely absurd that someone’s trying to make a movie based off the Greg Behrendt book He’s Just Not That Into You. It’s a great book that revolutionized my dating life, but it’s a stupid premise for a movie. And I hate that they’re doing this.

That said, the cast includes Jennifer Aniston, Ginnifer Goodwin, Drew Barrymore, Scarlett Johansson and Jennifer Connelly.

And word on the street is that the two Jennifers did NOT get along well during filming. In fact, Connelly will not appear with the rest of the cast on an upcoming Marie Claire cover, because Aniston reportedly threatened to pull out of the shoot if Connelly participated. (Johansson will not appear, either, as she was apparently unavailable for the shoot.)

According to Life & Style:

Connelly… will not be included in an upcoming cover shoot for Marie Claire magazine that will feature Aniston… and her other co-stars from the October comedy, Drew Barrymore and Ginnifer Goodwin. “Word is, Aniston threatened to pull out if Jennifer was part of the cover,” says an insider familiar with the movie’s shoot. “It was all about getting Jennifer Aniston front and center and looking as sexy as possible.”

So what’s Jen’s beef with [Connelly]? While Aniston’s rep denies that there’s any discord between the actresses, they just didn’t hit it off, says the insider: “There was no camaraderie between those two whatsoever. They didn’t seem like friends in the slightest.”

Aniston’s probably just bitter because Jennifer Connelly has a happy marriage and kids, and Aniston’s stuck trying to get John “Player” Mayer to settle down.

On the heels of initial reports that the two were spotted sharing a meal in Miami, we’re now hearing that they later had an intimate dinner that lasted until 1 a.m.

They had a “cozy” dinner at Casa Tua in Miami Beach, and were spotted holding hands as they returned to their hotel.

Damn.

What do we think of this new pairing, kids?

I asked you guys last month if you still cared about Jennifer Aniston, and the response was an overwhelming yes.

So here she is on the set of Marley and Me, in Miami, with Owen Wilson.

I don’t think I’ve seen anyone wear short overalls with a tank top underneath them since high school, but that’s the costume department’s problem, not Jen’s. And she actually looks cute as a button in them.

Owen looks great, too. It’s good to see him working and seeming happy again.

Brad Pitt already has his own production company. It’s called Plan B Productions. When it was originally founded, Jennifer Aniston was a partner. She split from the company after her marriage to Brad fell apart.

Now Jennifer has her own Plan B. I suppose Plan A was to be married, have a family, and live happily ever after. That didn’t work out so hot, so Jen just founded her own production company with friend Kristin Hahn. It’s called Echo Productions, and they’ve acquired the rights to the British bestseller Getting Rid of Matthew, among other projects.

Who needs a happy marriage or an Ethiopian baby when you can have your own production company?

Yay, women’s lib!