The last time we saw Iron Man was in 2012's The Avengers, but Robert Downey Jr. and Gwyneth Paltrow are back as Tony Stark and Pepper Potts in the new trailer for Iron Man 3!

Stark prepares to battle it out against the Mandarin (played by Ben Kingsley), and as always, the flick promises plenty of explosions and gunfire.

The Avengers sequel won't hit theaters until 2015, but around the time Iron Man 3 is released, Captain America: The Winter Soldier will begin shooting, so we'll be getting our fix of our fav Marvel comic characters until the whole crew is reunited to duke it out against Thanos.

Iron Man 3 hits theaters on May 3.

What an adorable family!

Alessandra Ambrosio took time out of her busy modeling schedule yesterday to squeeze in quality time with daughter Anja and son Noah, and it appears her little girl has a talent at making her brother laugh!

The 9-month-old was gazing down at his sister and cracking a huge grin, and we can't believe how cute he is with that rabbit ear hoodie on!

We love the Victoria's Secret stunner's outfit of a tangerine sweater and blue tie dye jeans. It looks like someone is ready for summer already!

Taylor Swift covers the March issue of Vanity Fair, and the 23-year-old singer slams reports that she's a serial dater. "You know, if you want some big revelation, since 2010 I have dated exactly two people," Swift says, referring to Conor Kennedy and One Direction hottie Harry Styles. “[T]he fact that there are slide shows of a dozen guys that I either hugged on a red carpet or met for lunch or wrote a song with ... it’s just kind of ridiculous."

When asked if she’s boy-crazy, Swift smiles and says:

“For a female to write about her feelings, and then be portrayed as some clingy, insane, desperate girlfriend in need of making you marry her and have kids with her, I think that’s taking something that potentially should be celebrated -- a woman writing about her feelings in a confessional way -- that’s taking it and turning it and twisting it into something that is frankly a little sexist.”

While Swift didn't talk about her relationship with Styles, the mag says she "authorized someone to discuss them" with contributing editor Nancy Jo Sales. “He wore her down,” the source says, adding that he “chased” Swift for a year. “He was all, like, ‘You’re amazing—I want to be with you. I want to do this.’” After Swift ended the relationship, he pursued her for nearly a year until she finally took him back. “But the whole time she says she feels like he’s looking at every girl,” the source said. Interestingly enough, Styles' rep said that the source’s claims are “undeniably false.”

While the source added that her relationship with Kennedy was “just like a two-month thing,” Swift “says he was awesome,” and they noted that age has been a huge problem in all of her relationships. “She dated Jake [Gyllenhaal] and John [Mayer] when she was really young and they were in their 30s, and she got really hurt," the insider said. "So it was like ‘That hurt—this won’t. But then it did.’”

In response to reports that Swift bought a house next to the Kennedy family's Hyannis Port compound, Swift says:

“People say that about me, that I apparently buy houses near every boy I like—that’s a thing that I apparently do. If I like you I will apparently buy up the real-estate market just to freak you out so you leave me. One of these things I say to myself to calm myself down when I feel like it’s all too much ... If there’s a pregnancy rumor, people will find out it’s not true when you wind up not being pregnant, like nine months from now, and if there’s a house rumor, they’ll find out it’s not true when you are actively not ever spotted at that house.”

But Sales reports that Swift actually did purchase the house, as Ocean Drive LLC purchased it for $4.8 million in 2012. Just who is Ocean Drive LLC? The company’s filing papers name Jesse P. Schaudies of 13management, which is Swift’s management company. Between the information about the house and Taylor's mysterious source, we're not sure what to make of her latest sit down...

She really makes sure she gets solo time with each of her kiddos!

Jennifer Garner held tight to daughter Violet as they strolled through Brentwood yesterday, and the mother-of-three must have been in such a rush to hang with her little girl that she didn't even care to blow dry her hair before leaving the house. She still looks so gorgeous, though!

The bubbly brunette and her daughter stopped by their favorite haunt, The Brentwood Country Mart, before making their way back home. Siblings Sam and Seraphina must have been waiting back at the house with dad Ben Affleck and his brother Casey.

The Argo star's little brother has been in town visiting, and we're sure all the kids are thrilled to have their uncle around!

They are inseparable these days!

Paris Hilton and beau River Viperi made Monday their date night when they decided to enjoy a romantic meal at Il Pastaio, and our favorite heiress decided to amp up her outfit with some sexy stockings! We doubt her boy toy minded!

The Simple Life star might be looking to settle down now that she's a year older, but if her 32nd birthday bash was any indication, she's still a party girl at heart! The blonde bombshell hosted an Alice and Wonderland themed fete, and even got Lil' Wayne to put on an impromptu performance.

If these two stay together for the long haul, River better get used to life in the fast lane!

Adrienne Maloof has confirmed that she is leaving The Real Housewives of Beverly Hills.

The reality star tweeted on Monday, "To my loyal fans ... It was time to exit RHOBH. The show served as a wonderful platform, stay tuned!"

Maloof added on her blog, "The show served as a wonderful platform for all the amazing projects that I have in the works. I am forever grateful to my fans, thank you for your support, and stay tuned!"

After getting divorced from husband Paul Nassif on season three of the show (not to mention her famous feuds with co-star Brandi Glanville), Maloof had just about had it with the drama. Maloof was scheduled to tape a reunion special last Friday with Glanville and her other co-stars, including Lisa Vanderpump, Kim Richards, Kyle Richards and Taylor Armstrong, but at the very last minute she bailed.

A source told Us Weekly that Maloof would rather focus on her kids than the show. "She doesn't need that kind of negativity in her life," they told the mag.

Ha! Like these two could ever be low key...

On Monday Kat Von D and fiance Deadmau5 stopped by the Ivy in West Hollywood for lunch, and between her tiger pants and their aggressive groping, our heads are spinning!

We're not sure when the inked up lovebirds will make it down the aisle, but the reality star has certainly made a good impression on his family! Kat tweeted the photo below and wrote, "Dropped off mom-in-law at airport after 2 amazing weeks of having her stay w us. She left behind this gratitude journal for us.. How'd I get so lucky?"

Justin Bieber reportedly showed up two hours late to his concert at London's O2 Arena on Monday, and many of his fans have posted angry tweets about his tardiness and the subsequently shortened set.

According to the official ticketing website for the venue, doors opened at 6:30 (Cody Simpson went on a 7:30, Carly Rae Jepsen went on at 8) and Bieber was set perform at 8:30pm, but a concertgoer told Us Weekly that Biebs didn't even make it to the stage until after 10:30!

When he did arrive, fans were booing, and Us reports that "young fans were falling asleep before he finally arrived," and one fan tweeted, "Lots of unhappy parents on a school night, but feel sorry for little kids crying because they missed half concert. Was good though."

A rep for Justin Bieber had no comment on the matter, but according to Us Mag, a different insider at the show said, "This is not true. He was not supposed to go on until 9:30 and he went on just after 10. He was not two hours late. There was no booing." We can't imagine he'd let his fans down like this, but they can't all be making this up, can they?

UPDATE:
Bieber released the following statement on Twitter:

“since i have been here it hasnt been easy with the press at times but I have loved it. so let me say this … last night i was scheduled after 3 opening acts to go on stage at 935 not 830 but because of some technical issues i got on at 10:10..so…i was 40 min late to stage. there is no excuse for that and I apologize for anyone we upset. However it was great show and Im proud of that ... and tonight we will run on time and look forward to putting on an amazing show for everyone in attendance. my relationship with the media is not always easy but im trying. Im all about the music and the performance and i respect my fans ... now we have a show to do today and Im gonna focus on the positive and put on a great show tonight here in London.”