Iron Man 3 outperforms at the box office…Keira Knightley’s top secret wedding, Miley Cyrus tops the Maxim’s Hot 100 list and a fan gets a little too close to Justin Bieber…

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No surprise whatsoever that “Iron Man 3” was number one at the box office this weekend. It earned $175.3 million in the US during its opening weekend. It’s been out two weeks overseas, where it’s already earned over half a billion dollars. Coming in a distant second was “Pain & Gain” with $7.6 million. “42” was third with $6.2 million. “Oblivion” and “The Croods” rounded out the top five.

Keira Knightley married her rocker boyfriend James Righton in the south of France over the weekend. She kept things so secretive that she didn’t even tell James’ parents! They told their guests they were throwing an party to celebrate their upcoming wedding, but surprise!! This is it! Only 11 guests — including Sienna Miller — were there to watch the couple exchange vows at town hall. Keira kept things so low-key that her wedding dress was something she wore to a party way back in 2008! After the ceremony, the newlyweds threw a party at Keira’s farmhouse, where guests reportedly danced until dawn.

Miley Cyrus officially joined Instagram and used the occasion to thank her fans for crowning her #1 on Maxim’s Hot 100 list and showed us the photo of her in a gold swimsuit. Miley also tweeted, “Didn’t know this was coming out yet! I’m so happy to be #1 on Maxim’s HOT 100! #myfanskicka** #dreamsdocometrue” and then added a link to that same photo. Here’s the thing — the news DIDN’T come out yet. Miley beat Maxim to the punch. No word yet on how Maxim feels about Miley leaking their biggest-kept secret.

Last month, Lindsay Lohan sat down with Piers Morgan to talk about her druggie reputation. She told Piers that she doesn’t consider herself to be an alcoholic and that she’s actually given up drinking for a year before. She also said she’s only done cocaine maybe four or five times. She says she doesn’t like it because it reminds her of her dad. She’s also never taken heroin or LSD because those things scare her. But she had to admit that she did like the ecstasy! So why does the judge think she needs rehab?? Lindsay obviously doesn’t think she needs to be there. And reportedly, she’s begging her back-on-the-case lawyer Shawn Holley to get her out of Betty Ford and into someplace else. A source says she’s thinking she’d do better at a treatment center in Hawaii or Antigua even Florida!!

What happens when an over-eager fan meets an over-eager security guard? The piano gets hurt. Justin Bieber was onstage in Dubai, sitting at the piano performing “Believe,” when a fan scrambled on stage and went to hug him from behind. That’s when a security guard dashed from backstage, tackling the fan and the piano. Justin managed to skip away and finish the song as security guards dragged the fan away. The piano wasn’t so lucky.