Shia LaBeouf is opening up about why he believes Megan Fox didn't stick around for Transformers: Dark of the Moon. Victoria's Secret model Rosie Huntington-Whitely replaced the brunette beauty in the summer action flick.

In a recent interview with the LA Times, Shia says:

“Megan developed this Spice Girl strength, this woman-empowerment [stuff] that made her feel awkward about her involvement with Michael, who some people think is a very lascivious filmmaker, the way he films women. Mike films women in a way that appeals to a 16-year-old sexuality. It’s summer. It’s Michael’s style.

And I think [Fox] never got comfortable with it. This is a girl who was taken from complete obscurity and placed in a sex-driven role in front of the whole world and told she was the sexiest woman in America. And she had a hard time accepting it."

As for why her relationship with director Michael Bay didn't work, Shia adds:

"When Mike would ask her to do specific things, there was no time for fluffy talk. We’re on the run. And the one thing Mike lacks is tact. There’s no time for [LaBeouf assumes a gentle voice] ‘I would like you to just arch your back 70 degrees.’”

Read what Shia had to say about Rosie joining the franchise ... after the jump.

The first full trailer for the new Transformers flick has arrived, and it's intense!

Looks like director Michael Bay opted to save any one-liners, which lighten up the action flicks, for the theater. This trailer is action sequences and hotness only -- the hotness being Shia LaBeouf, Josh Duhamel, Patrick Dempsey, Rosie Huntington-Whiteley and Tyrese Gibson.

We'll be interested to see how the pic explains the departure of Megan Fox's character (Rosie Huntington-Whiteley is Shia LaBeouf's new love interest.) Maybe she met an untimely robot death?

But, the flick is sure to have laughs because some hilarious comedians have joined this cast that weren't in the first two; see who after the jump!

Shia LaBeouf dodged questions about his recent bar brawl while running errands in Hollywood today.

"What happened over the weekend with the bar fight?" an X17online photog asked the Transformers 3 star when he was leaving the gym. LaBeouf said nothing, but just slammed his car door and sped off. Despite wearing a "Teddy Bear Beach" t-shirt, Shia was not in a cuddly mood.

Shia was briefly handcuffed by police in the early hours of Saturday morning this weekend after an apparent bar fight at Mad Bull's Tavern in Sherman Oaks.

According to various reports, LaBeouf was being heckled by a fellow bar patron and was later punched in the mouth when the argument was moved outside. Local LAPD officers showed up, handcuffed the actor, questioned him and then released him soon after.

This is not the first time Shia has been in trouble with the law.

The actor was charged with misdemeanor criminal trespassing after refusing to leave a Walgreens store in 2007, and then was arrested in Hollywood on suspicion of drunk driving (but never charged with a DUI) in 2008.

The star of Wall Street: Money Never Sleeps is always getting into trouble! First the actor was charged with misdemeanor criminal trespassing after refusing to leave a Walgreens store in 2007, and then was arrested in Hollywood on suspicion of drunk driving in 2008.

Now Shia LaBeouf was briefly handcuffed by police in the early hours of Saturday morning this weekend after an apparent bar fight at Mad Bull's Tavern in Sherman Oaks.

According to various reports, LaBeouf was being heckled by a fellow bar patron and was later punched in the mouth when the argument was moved outside. Local LAPD officers showed up, handcuffed the actor, questioned him and then released him soon after.

It seems the patrons picking on the Transformers star fled the scene before the cops arrived.

No charges were filed.

Most young celebrities like to be photographed leaving Hollywood's trendiest clubs, but not Shia LaBeouf. Despite the heavy downpour of rain, the actor hit up Silver Lake's Red Lion Tavern for some low-key good times, and we're told he closed out the joint. Judging by the look on his face, he must have had a blast!

Although the German pub doesn't usually attract Hollywood's A-list, the 24-year-old Transformers star is a regular.

Now that Shia has wrapped Transformers: The Dark of the Moon, the hottie has a right to party, but let's hope he goes for a haircut ASAP. But we love the sexy scruff!

After a few recent aggressive run-ins with photographers, it's great to see Mr. LaBeouf having a good time. Live it up, Shia!

And no offense to Shia's lovely lady, but she's no Carey Mulligan! AKA Kate Winslet 2.0.

Transformers 3: Dark of the Moon "hunk" Shia LaBeouf scarfed down some pancakes - and later smoked a cig - at Jinky's Cafe in Sherman Oaks on Sunday morning with a new girl and it looks like they had a fun time together! Of course, Shia could stand to shave slash comb his hair once in a while... just saying!

We KNOW he's got a sexy, ripped physique, so why on earth would Shia LaBeouf cover himself up with oversize gym clothes? The combination of the frumpy XL shorts and baggy tee aren't doing him any favors...

Maybe this is why Carey Mulligan split with the Transformers star! Shia LaBeouf decided to block a couple's car with his massive truck in Studio City earlier today - when the couple returned from shopping Trader Joe's, they had to wait 40 minutes for Shia to finish eating lunch at La Salsa...

And after a security guard questioned Shia, the young actor didn't even offer the couple an apology. Lame! Watch the whole thing play out above.