
Gaga marked John Lennon's 70th birthday at a tribute concert in Los Angeles, sharing the stage with fellow boundary-pusher Yoko Ono and Lennon’s son Sean. “I got to sit in as a guest musician tonight, what a legendary band+mother, Yoko,” Gaga tweeted after the show.

Doth they protest too much? Idol host Ryan Seacrest and pal Nicole Richie—who share a love for healthy but questionably appealing vegetable smoothies—were a little insulted when Kim Kardashian insulted their drink of choice. “Hey @kimkardashian, don’t deny the juice,” Seacrest taunted.

Halloween came early this year for the cast of Modern Family, who recently filmed a special holiday-themed episode for the Emmy-winning comedy. Or, as star Sofia Vergara calls it, “ Ready for Halloweeemm!!”

Duran Duran may be past their '80s prime, but the English pop group still brought the house down at a Paris fete for Karl Lagerfeld’s Fendi last week. “Everyone you can think of is at the #Fendi party dancing to @duranduran including… Karl,” tweeted model Coco Rocha.

Sound familiar? Jersey Shore star and newly minted literati member Snooki picked up a pint-size orange friend last week. “Everyone meet Gia!! My princess!!!” she tweeted from the pet shop.

Have you Mad Men’d yourself yet? Alanis won’t be appearing on the AMC show any time soon—she’s several months pregnant and already guesting on Weeds—but she tweeted her own results of the popular new meme anyway.

Shooting “Reflections at 30 Rock,” Jimmy Fallon told his Twitter followers last week, doing his best Justin Bieber impersonation. The late-night host was filming a parody segment for his show titled “ Reflections with Justin Bieber.”

Paris Fashion Week isn’t just for style icons. Rocker Lenny Kravitz met up there with Kanye West, who’s in the City of Lights putting the final touches on his next album, and members of U2. “Paris… The Edge, Bono, @kanywest and I,” Kravitz tweeted nonchalantly.

Can we talk about that sandwich, Joan? “My very first Elvis Sandwich,” Rivers tweeted from Las Vegas’ scenic Mt. Charleston Lodge. For those of you wondering, the house specialty—a tribute to Presley—is battered, deep-fried, and filled with the King’s favorite ingredients: peanut butter and bananas.

“Geekin’ out!” Justin Timberlake tweeted last week—and he wasn’t talking about his role in The Social Network. To promote the new Facebook movie, Timberlake made an appearance on ESPN’s NFL Countdown. Apparently, he’s a fan.

Last year, Ashton Kutcher bought his wife Demi a Prius for her birthday—is she already due for an upgrade? Moore, who turns 48 in November, tried out Mercedes’ new $90,000 hybrid and seemed quite taken with it: “…love that they are going green and with style!” she tweeted.

With J. Lo and Aerosmith’s Steven Tyler added to the judges table, American Idol will look a little different when it returns in January. Host Ryan Seacrest gave his Twitter followers a sneak peek. “Our new American idol panel in today’s press conference. lots of laughs today,” he tweeted.

Stamos made his Glee debut—he’ll be on for 10 episodes this season—in this season’s buzzed-about Britney Spears episode, where cast member Heather Morris made for an impressive Britney impostor. Stamos tweeted that it was “an incredible simulation.”

Hey, sex sells. Comedian Russell Brand celebrated the release of his new book, Booky Wook 2 with a nearly completely nude Twitpic. “Erotic literature?” he tweeted. Seems like the answer is yes!


