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Oh, Brooke Hogan!

You really, um, impressed the crowd last night at Enclave nightclub in Chicago.

A source reports that the reality television star/singer showed up at the hot spot "in an utter state of hot drunkenness." At about 2 in the morning, Hogan jumped onstage and gave an impromptu performance of slurred lyrics and wobbly dance moves.

Hogan isn't the only celeb we've spotted out and about recently. Read on for scoop on Reese Witherspoon and Jake Gyllenhaal, Blake Lively, Jon Hamm and E!'s very own Joel McHale...

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AnnaLynne McCord and Kellan Lutz better get in as much time together as they can these days, because as we all know Lutz is pretty darn busy promoting that quiet little movie, New Moon.

Just last week the hunkster hit the Sony Cierge event at L.A.'s SLS hotel with his brother Brandon, but shortly before the shindig ended, along came the 90210 beauty and her ubiquitous nonfamous sister Angel.

Lutz and McCord were only spotted giving each other pecks on the cheek and even asked event organizers not to have their photo taken together, a source reports.

No biggie, because we got the chance to talk to Lutz a couple of days later. Ya gotta come back here tomorrow to find out what he had to tell us about liking Eclipse more than New Moon, his drooled-over muscles and trying to have a private life.

Meanwhile, keep reading for more celeb sightings, like Taylor Swift...

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Talk about dinner under the stars.

Madonna and her much younger hottie boyfriend, Jesus Luz, were spotted just the other night having dinner at Mr. Chow on 57th Street in New York City with Penélope Cruz and her maybe-fiancé Javier Bardem.

And that's not all. Eva Mendes also joined them for the evening.

So what did the group enjoy (besides the company)? Chicken satay and Beijing duck. While most of the group sipped adult drinks, Cruz appeared to be having an alcohol-free night. "They were loud and laughing," an eyewitness tells us.

They wrapped things up after about two hours.

What other celeb couple scoop do we have for you? Read on for dish about Mel Gibson and his baby mama as well as newlywed Mandy Moore's plans for kids…

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Katie Holmes and Suri sure do love shopping together.

Our spies spotted them earlier today at Madewell on Boston's Newbury Street taking home bags and bags of stuff.

Mama Katie and 3-year-old Suri spent over an hour in the store and walked out with new denim motorcycle boots and a slew of scarves to keep them warm in Beantown while Tom Cruise shoots Wichita with Cameron Diaz.

Who else have we spotted out and about lately? Read on for deets about Gerard Butler's flirty ways, a couple of Brothers & Sisters stars and our favorite shark lady…

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Selena Gomez is definitely not the only celeb these days into singer-songwriter Jason Mraz.

One of our spies spotted Twilight stars Ashley Greene and Kellan Lutz on Wednesday night at the "I'm Yours" hitmaker's concert at the GM Place Arena in Vancouver, where our fave vampire movie franchise is filming Eclipse.

"They were watching the show from the soundboard area," the eyewitness reports. "Toward the end of the show, Jason and a couple of guys in his band went out on a small stage and did a few songs right there at the soundboard so the [people in the] back of the arena were able to see him up close."

After the show Greene and Lutz hung out backstage, as did Friday Night Lights star Scott Porter.

Who are some of the other boldfaced names we've recently seen here, there and everywhere? Read on for deets about Kate Hudson, Audrina Patridge and the always fashionable…

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Jason Merritt/Getty Images; Discovery

Who would ever have imagined that January Jones is brave enough to jump into the ocean to swim with sharks?

But that's exactly what she did recently in the Bahamas with Oceana, an environmental group dedicated to protecting the world's oceans. She hoped to send a message that sharks are not only vital to ocean life, but they're also not as scary as most people think.

"It's exhilarating," Jones told me yesterday at Variety's Power of Women luncheon, where she was honored for her work with Oceana. "They're beautiful creatures and to be in that close proximity with them was a dream come true."

The Mad Men blond bombshell, who looked her usual stunning self in a black BCBG dress, isn't the only star we've spotted out and about recently. Keep reading for some Katherine Heigl baby cuteness, Ashley Greene's sort-of night with Gerard Butler and so much more...

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It's not all work and no play for Kevin Jonas as he and his famous brothers shoot the sequel to Camp Rock up in Canada.

The oldest JoBro was able to slip away from the set for a bit to hit the Toronto Film Festival.

Keep reading to find out where he went and what he did…

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HOTEL CALIFORNIA: Justin Timberlake and Jessica Biel, enjoying a postworkout lunch at the Avalon Beverly Hills. J.T. chose the chicken paillard while Ms. Biel went for a chicken salad.

FAMILY MATTER: Nick Jonas and his younger brother Frankie, watching the Yankees/White Sox game in the Skybox at ESPN Zone NYC.

PLAYING GAMES: Twilight hunkster Kellan Lutz, hitting the Nintendo Showroom in L.A. to check out Wii Sports Resort and Wii Fit.

Speaking of Lutz, keep reading to find out where we caught one of his new bloodsucking costars hanging out in Vancouver...

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Courtesy TAO/Denise Truscello

RUMER HAS IT: Rumer Willis celebrated her 21st birthday at Tao at the Venetian Las Vegas Saturday night with Madonna and Elvis impersonators. Oh yeah, mom Demi Moore, Ashton Kutcher, dad Bruce Willis and his new wife, Emma Heming, were also there.

Rumer's Sorority Row costars Audrina Patridge, Briana Evigan and Jamie Chung joined in the festivities, which included a midnight toast with Patrón Platinum tequila.

Want to know what some more of your fave celebs, including Justin Timberlake, Charlize Theron and Shia LaBeouf, have been up to lately? Keep reading to find out.

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Scott Berry/Hard Rock Hotel & Casino

GET A ROOM: Pamela Anderson and Tommy Lee, making out this weekend at Body English at the Hard Rock Hotel & Casino in Las Vegas after his Mötley Crüe concert at the Joint.

WHAT A GUY: Justin Timberlake, taking pics with fans at his box seat at the Hollywood Bowl, where girlfriend Jessica Biel was starring in a two-night engagement of the musical Guys & Dolls.

We know how much ya love looking at some nice abs, so we're sure you won't mind the celebrity six-pack we posted after the jump...

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With no Angelina Jolie in sight, Brad Pitt jetted into Berlin earlier today for the premiere of his new Quentin Tarantino movie, Inglourious Basterds. Sources tell us that it's a quick, 24-hour trip that included the red carpet gala and some media for the much-buzzed about WWII flick.

Pitt looked smashing in Tom Ford, and with a glass of beer in hand, watched the screening in a seat next to Tarantino.

"He also spent loads of time signing autographs" outside the theater, an eyewitness reports. 

Pitt's next Inglourious appearance will be at the film's Hollywood premiere on Aug. 10. No word yet if Jolie will be joining him for the festivities.

Get more star sightings after the jump, including deets on newly single Joe Jonas' recent New York City shopping trip with two gal-pals...

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