Keira Knightley has been learning to play the guitar for her role as a young singer-songwriter in the upcoming flick, Can A Song Save Your Life, and she already looks like a pro!

The Pirates of the Caribbean star took the stage to shoot a scene that featured her strumming the guitar, and belting out a tune with her band on the NYC set, while her on-screen love interest, costar Adam Levin, enjoyed some time off with his motorcycle, on Thursday, in Hollywood

Meanwhile, the first trailer for Knightley's highly anticipated period flick Anna Karenina, has just been released, and the film has finally been given a premiere date of November 9. Check it out, after the jump ...

Even though Lindsay Lohan was spotted leaving a Beverly Hills medical building on Thursday afternoon, it looks like all is well after her minor car accident yesterday afternoon!

Lilo was snapped in a stunning striped maxi dress, and it looks like she had a day off from shooting her latest flick, The Canyons. So what do her current co-workers think of her? Nothing but the best! Director Paul Schrader is so impressed with the starlet's work on his new film that he has taken to Facebook to write a few glowing remarks about her.

Schrader writes, “Seven days in, first full week completed. Lindsay Lohan is a huge fan of Hollywood glamor and performances from the Golden Era. Working with her every day on varied scenes I’ve been making a mental checklist of classic movie performances she’s touched upon ... There’s has been a lot of Ann Margaret, some Gena Rowlands and Faye Dunaway and of course some bits of Liz Taylor and (Marilyn) Monroe as well as a little Rita Hayworth and even Gene Tierney (although the last may be more my creation than hers). Oh yeah, and Angie Dickinson. And Lee Remick. And Shelley Winters… Paul S.”

Think this will be Lilo's big comeback?

Perry Sanders Jr. is ready to have Katherine Jackson sign paperwork to be reinstated as guardian of Michael's three children ... Paris, Prince and Blanket, however we've learned exclusively that TJ Jackson has instructed security to not allow him into Katherine's Calababas home.

Our Jackson family source tells X17online exclusively:

"TJ won't allow Perry to do his job and won't allow his grandmother to speak to any of her children. Trent and the security team, who Katherine fired already, are refusing to leave the premises. They also won't answer the phone at the house. Family members are worried sick about Katherine's safety. Once again, they are using trickery. "

Just yesterday, Tito Jackson's 34-year-old son was granted temporary guardianship. However, as X17 first reported, Katherine's attorney Perry Sanders Jr. is ready to file paperwork "asap."

We told you first that Katherine fired Trent and the entire security team before leaving her vacation spot in Arizona to come home. Our family source, who heard the phone conversation, says Katherine directly told Trent, "You better be gone by the time I return home." Trent replied with the following: "We don't work for you, we work for the estate. We're not leaving."

The Jacksons tell us they believe family advisor John Branca was behind the confrontation on Monday at the Jackson estate between Janet, Randy, Jermaine, Paris, Prince, Trent and the security team.

Following Monday night's altercation at the Jackson compound in Calabasas, Branca and the estate's co-executor John McClain, released the following statement:

"We are concerned that we do what we can to protect them from undue influences, bullying, greed, and other unfortunate circumstances. While we do not have standing to directly intervene, we have monitored the situation and will continue to do so. We believe measures are being put in place that will help protect them from what they are having to deal with."

Family members tell us they believe Branca "is trying to paint a picture that under Katherine's supervision, the kids aren't being cared for" and that "TJ is being coached" by Branca.

UPDATE: 6:30 PM PST - The Jackson family has confirmed to us that Katherine is safe at this moment, despite TJ blocking her attorney from entering the home.

UPDATE: 9:40 PM PST - Perry Sanders Jr., Mrs. Jackson's attorney, was eventually allowed into the home to speak with Katherine. Sanders tells X17: "I had a long and productive meeting today with Mrs. Jackson. I am pleased to report that she is fine and she laughed at the widely publicized report that she had suffered a stroke. I will be releasing a formal statement tomorrow morning regarding the results of the meeting."

When you stop and consider how many bankable roles Angelina Jolie has gotten after stealing Brad Pitt from Jennifer Aniston back in 2005, probably not!

We were shocked when we learned that Kristen Stewart cheated on boyfriend Robert Pattinson with her married Snow White and the Huntsman director Rupert Sanders, and while it's still not clear whether Rob is leaving her, we now have to wonder what's going to happen with her professional life.

Remember when Claire Danes cheated on then-boyfriend Ben Harper while simultaneously luring Billy Crudup away from longtime love Mary-Louise Parker ... when she was 7 months pregnant with their child? That happened in 2003, and in the years since then, she's won 2 Golden Globes, an Emmy and scored a role on a hit Showtime series! Starlets like Britney Spears, Elizabeth Taylor, LeAnn Rimes and Sienna Miller have all split up marriages and families in their dating careers, and while being labeled as a homewrecker is a bit embarrassing, it's definitely not stopping these ladies from earning a paycheck!

Stewart is reportedly set to star in the sequel to Snow White and the Huntsman, and she'll begin production on the new Nick Cassavetes flick, Cali later this year. Variety is reporting that British bad boy Alex Pettyfer will play her love interest in the film, so if both of the stars are single when shooting begins, who knows what might happen? They would certainly make an interesting couple!

Kristen isn't the only one ... Click the gallery below for photos of Hollywood's most famous cheating celebs!

Some people are lucky enough to be able to rock a bunch of different looks!

Gwen Stefani left her hotel in NYC today in an outfit that reminds us of her mid-90's ska faze! The blonde beauty donned a ripped Specials t-shirt, black blazer, and burgundy Doc Marten's, and it's amazing how she can transition from glam to grunge!

The No Doubt front woman and her band are in town for a performance on Late Night with Jimmy Fallon, and considering how well their recently released single "Settle Down" has done, we are confident in saying they're officially back on top!

We can't wait to watch!

Rollacoaster

Justin Bieber is giving good face in the pages of Rollacoaster magazine.

The 18-year-old "Baby" singer, rockin' sweats in the black & white spread, tells the mag:

"I am growing up, I am now 18 and my fans are growing up with me.
‘I’m getting older and I want that to reflect in my album – it is just more mature and reflecting the age that I am."

As for his new professional goal? Biebs adds:

"‘Each time I break a record I’m always happy. With my YouTube stuff, Baby has more views than any video – ever. So my next goal is to reach one billion views on a video."

See JB in all his B&W glory in the gallery below.

We're sure he's still with Victoria's Secret hottie Behati Prinsloo, but every once in a while he needs a little bromance!

Adam Levine was snapped lunching with a male pal at The Oaks in Hollywood, and later we caught the Maroon 5 hottie riding away on his sweet Harley Davidson. Wonder when he's gonna take his new ladylove for a spin on this motorcycle?

The two were spotted getting cozy in NYC last week, but according to sources close to the tatted up hunk, they're taking it slow. "He's having fun with her right now," the pal told Us Weekly. "He said he didn't want to date a model again but hey, he's a rock star, so it's sort of in his blood!"

Paris Hilton, Chris Brown and the singer's girlfriend Karrueche Tran rocked the house at Provocateur Club at Gotha in Cannes. What a sexy threesome!

Can't help but notice that big stogie in CB's mouth. Such a party animal, and we love it!

Speaking of Brown, he recently Tweeted his two cents about the Jackson family drama. Rihanna's ex Tweets:

“That Jackson family feud s**t gotta stop! Stop making y’all business public! Michael was under enough scrutiny. Don’t put the kids through the bulls**t! Work y’all s**t out as a family and stop giving them the pleasure of f**king wit y’all!”

As for the gorgeous heiress, she wore a striking gold Versace dress paired with cute pink horns while watching Chris Brown perform for the crowd in the South of France.

After the concert, a tipster tells us, "They all got into a white Lamborghini. Chris was seen driving over 100mph down the Croisette."

Sounds like they're living life in the fast lane!