Uh ... we're guessing it's a 128GB Retina display model -- yes, it appears doting mom Katie Holmes dropped $929 on 7-year-old daughter Suri Cruise Saturday at the Apple store in New York City.

Looks like Suri just traded her stuffed animal for a more high-tech toy ...

Justin Timberlake arrived at Los Angeles International Airport on Friday evening for a flight to the U.K., and even though he's not known to be the most warm and fuzzy celeb, he took some time to sign autographs for fans.

JT is performing in London tomorrow night at the Roundhouse, and after that he'll have a month off before his Halloween show at the Bell Centre in Montreal. The 32-year-old singer will then be booked solid November through January with gigs all over North America. We bet wifey Jessica Biel can't wait to have him back at home!

We were shocked when we learned that Zac Efron secretly completely two stints in rehab earlier this year for an alleged addiction to cocaine, but it looks like the 25-year-old actor is getting back on track!

Efron posted the above photo on Instagram on Friday from Machu Picchu, Peru and wrote, "Hey guys! Just returned from an incredible trip to Peru with my dad and wanted to thank you all for your support these past few weeks...means the world to me. Love you guys! - Z" Awww!

Zac had reportedly been doing cocaine for more than 2 years, and several websites report that he was also using Molly and Oxycodone. He initially sought treatment in March for several weeks, but around the time he was shooting Seth Rogen's film Neighbors, he had a relapse. Thankfully Zac has cut his party buddies out of his life, so here's to him getting better!

Between taking Samuel and Seraphina to the park earlier and then going to karate practice with Violet, Jennifer Garner totally has her hands full!

And not only that, but after carrying her little boy around, Jen gave her 8-year-old daughter a lift. Violet must have been totally worn out from her martial arts class to have guilted her mom into this!

But where's daddy Ben Affleck? If he's slipped out of LAX and already on the Missouri set of Gone Girl, he did it totally under the radar...

Billboard/Ryan McGinley

Katy Perry covers the new issue of Billboard Magazine, and the 28-year-old singer talks about her current beau John Mayer and how some of the songs on her upcoming album Prism were inspired by her painful split from ex-hubby Russell Brand.

On Mr. Mayer:

“He literally is a genius, as is evident from his songwriting. I always tell him, ‘Darling, you know I’m going to have to give your mind to science after you’ve passed, because we’re going to have to understand how all these sparks work.’ We’ll be in bed, and he’ll be doing the crossword puzzle. Every night, he tries to finish it in under 10 minutes. When he puts his mind to something, he really gets it done very well. I always ask for his help.”

When asked about the interview she did with Barbara Walters right before she announced that she was divorcing Brand:

“I shouldn’t have done the interview: I was playing Madison Square Garden that same night, and I knew that the end of my marriage was coming. I was just exhausted and stressed. I’d prepped everyone that I was running late, but Barbara showed up at the original time anyway. When I got there, I apologized immediately, but then she said to me, ‘You know, I’ve only ever waited for one other person this long, and you know who that person was? Judy Garland. You know how she turned out, right?’ I was like, ‘Oh, snap! Yes, b*tch!’ I think it’s the coolest thing that Barbara Walters shaded me. I just couldn’t tell her as we were sitting down for a mega-interview, ‘Hey, my marriage is falling apart. Give me a break.’”

As far as songs on her EP, which will be released on October 18, there are some upbeat numbers, but there are also a few melancholy melodies about Brand. In "Ghost" she sings, "You sent a text/It's like the wind changed your mind" and in "By the Grace of God," the track begins with Perry lying on the bathroom floor fighting suicidal thoughts. "That song is evident of how tough it really was at a certain point. I asked myself, 'Do I want to endure? Should I continue living?'" Perry says. "All the songs are real-life moments. I can only write autobiographically. I put all the evidence in the music. I tell my fans if they want to know the real truth about stuff, just listen to the songs."

We love "Roar" -- we can't wait to hear the rest!

Vanessa Hudgens hit the gym on Friday with her little sister Stella, and the actress was a bit camera shy when she walked back to her car.

She certainly wasn't feeling bashful when she was twerking and performing her new song "$$$ex" at Bootsy Bellows earlier this week though! We watched her show, and we have to say, she might be able to teach Miley a thing or two about shaking her rump...

Aside from getting positive feedback from bouncing her booty around, Vanessa also has some good news coming on the movie front. Roadside Attractions has acquired domestic distribution rights to Gimme Shelter, in which V plays a pregnant runaway teen. Yup, that's the role she chopped all her hair off for -- see, it paid off in the end!

We were seeing double on Friday when we noticed that Katie Holmes and Jennifer Aniston were both wearing the same button down plaid shirt!

Holmes wore skinny jeans and booties with hers in New York City on Friday afternoon, and though she totally tried to fly under the radar as she crossed the street, we pretty much spotted her from a mile away. But hey, this outfit is a huge improvement over her last two denim disasters, so kudos to her. And the shirt is obviously super trendy, as Aniston wore it with boyfriend jeans and wedges when we saw her at the salon yesterday...

In other news, Holmes has reportedly signed on to star in The Giver, according to The Hollywood Reporter. The flick is the big-screen adaptation of Lois Lowry's novel of the same name, and interestingly enough, several websites are reporting that country cutie Taylor Swift is in talks to join the cast.

The 34-year-old actress will play the mother of Jonas (Brenton Thwaites), and Jeff Bridges (the Giver) and Meryl Streep (Chief Elder) also star in the film. Interesting mix of stars, but we're intrigued!

On Friday afternoon Hilary Duff headed to Pilates class in the valley, and the former Disney starlet was in a great mood after her workout. Hmm, might this have something to do with the fact that it's her 26th birthday today? Or maybe just because she knows how bangin' her booty looks? Either way, we love to see her smile...

The other day the Duffster stopped by the Lair Studio in Culver City with producer Billy Mann (he's made hits with everyone from Celine Dion to Ricky Martin) and the duo worked on "Better Days," which is a track on Hil's upcoming album.

We're not sure what to expect from the new EP, but last month during a Twitter Q&A she told fans, "I'm exploring a lot of cool options & don't want to give a timeline yet but I promise exciting stuff is coming.. I'm super into EDM. Definitely catchy hooks I've always cared a lot abt lyrics & love to dance!"