Pop Tarts Scene & Herd: Celebrity Sightings

Sienna and Savannah Miller hosting a dinner at NYC's Royalton Hotel to celebrate their 2812 Spring/Summer 2010 collection on Monday night. (Starworks)

LOS ANGELES – Eva Mendes, Diane Kruger and Camilla Belle sitting next to each other in the front row sporting shades of Fekkai Blue, at the CFDA/Vogue Fashion Fund Fete presented by Frederic Fekkai at the Chateau Marmont in LA on Friday. M.I.A., Mary Kate Olsen, Jessica Alba and Jordana Brewster also attended the stylish soiree.

Janet Jackson wearing the “All that brown” watch from Jermaine Dupri and Pascal Mouawad’s soon to be launched line NU POP while sauntering thru LAX last Monday.

Leighton Meester, Dustin Hoffman and Rachel Zoe enjoying VeeV cocktails by the dance floor at NY Library Young Lions Gala on Monday night.

Ozzy and Sharon Osbourne ruling the ring as the celebrity guest hosts of Monday Night Raw at the DCU Center in Worcester, MA.

Kris Allen enjoying an afternoon coffee with a male friend at West Hollywood hotspot Cafe Primo on Tuesday.

Madonna, Valentino with Daphne Guinness, Hugh Jackman, Adrian Brody, Byrdie Bell, Marc Jacobs, Nigel Barker, Mischa Barton, Martha Stewart, Katie Lee Joel, Narcisco Rodriguez and Olivia Palermo mixing and mingling at the party for the DVD release of "Valentino: The Last Emperor"  at The Standard in NYC Tuesday night. Madonna sparked a Maestro Dobel fueled dance party upon arrival. Guests quickly gathered around her as she jammed out with Valentino to tunes being spinned by the Pop Queen’s boyfriend Jesus Luz.

Kellan Lutz, Neil Patrick Harris & Julian McMahon checking out the new gadgets at the Sony Cierge Holiday Preview at the SLS Hotel Los Angeles on Wednesday evening.

"The Hills" star Jayde Nicole, Brody-less, partying with a group of her girlfriends at the Verizon Wireless Samsung Rogue event at MyHouse in Hollywood on Wednesday night.

Larry Birkhead at Hard Rock Hotel & Casino playing slot machines and then partying late into the night Wednesday at Wasted Space. He was with an unknown female friend, having cocktails and mingling with the crowd.

Zac Efron partying at the NYLON Guys November Issue Launch Party at X1V in Los Angeles on Wednesday, while sipping Arizona Iced Tea alongside Brittany Snow.

Ricky Gervais performing to a sold out crowd at Carnegie Hall as part of The New York Comedy Festival, with special guest star Elmo.

The Offspring performing an eight-song set at Rain Nightclub inside the Palms on Wednesday before enjoying the view from a VIP table on stage.

Felicity Huffman and William H. Macy stopping into CRUMBS Bake Shop on Larchmont Thursday to treat one of their daughters to something sweet, ordering her a German Chocolate cupcake and two Peanut Butter Cup cupcakes for themselves.

Jessica Lowndes of "90210" running errands on Thursday in LA, staying energized with her Coke Aluminum.

Lauren Conrad, Lo Bosworth, Stephanie Pratt and Frankie Delgado, "The Suite Life's" Brenda Song, "American Idol’s" Kara Dioguardi, "Dollhouse’s" Eliza Dushku, "Dancing With The Stars'" Karina Smirnoff, who left moments before ex-beau Maksim Chmerkovskiy arrived,  90210's Jessica Lowndes, Matt Lanter and Ryan Eggold stopping by the French Connection Holiday Shop in LA last week.

"Full House" starlet Candace Cameron Bure stopping by the ASICS Hello Kitty Lounge in West Hollywood on Thursday afternoon.

Freida Pinto looking stunning (but keeping a low profile with beau Dev Patel) at the 18th Annual BAFTA/LA Britannia Awards in Los Angeles on Thursday. Meanwhile "Sunshine Cleaning" co-stars Emily Blunt and Amy Adams didn't leave each other's side all night,  toasting the evening with "London Beefeater 24" cocktails.

Cindy Crawford and her husband Randy Gerber strolling into the premiere of the film "A Single Man" at Audi's AFI Fest 2009 in Hollywood on Thursday evening. A myriad of celebs including Ginnifer Goodwin, Rita Wilson and Lisa Rinna then partied over at the Roosevelt Hotel (in their little black dresses) and toasted the film with a glass of Little Black Dress wines.

Colin Powell making a surprise visit to the The Cinema Society’s premiere of “Precious” at the Crosby Street Hotel in NYC on Thursday night where he mixed and mingled with the likes of Kyra Sedgwick, Iman, Carol Alt, Carson Kressley,  Paula Patton, Terrence Howard, Tommy Hilfiger, Kelly Ripa and Olivia Palermo.

"Real Housewife of NYC" Ramona Singer stopping by the opening of fashion designer Peter Nygard's flagship store in Manhattan on Thursday evening.

Jennie Garth and Busy Philipps shopping till they dropped at the VIP re-opening of Billion Dollar Babes in Los Angeles on Thursday night.

Alex Rodriguez, Joba Chamberlain, Chris Rock and Kid Cudi joining Jay-Z and bottles of Ketel One vodka in a private suite at the 40/40 Club in full celebration mode on Friday night. Just blocks away, team captain Derek Jeter toasted victory with Ketel One cocktails and his entourage at Hudson Terrace.

Usher enjoying dinner with pals at LA's Philippe Chow on Friday night.

Kelly Clarkson partying hard at Wasted Space inside the Hard Rock Hotel & Casino on Friday night after her concert - polishing off a few Stoli's while dancing the night away.

Lauren Conrad, Lo Bosworth, Zac Efron, Maria Menunous, Matthew Rhys, Annalynne McCord, & Cat Sadler checking out SBE's Sam Nazarian's new hotspot HYDE Lounge at STAPLES Center on Friday night as the Lakers defeated Memphis.

Eliza Dushku and Rick Fox joining the likes of Dennis Hopper, Kevin Connolly and Chelsea Handler for a few bets and good times at the 2009 Breeders' Cup World Championships in Arcadia on Saturday.

Larry King hosting his annual gala event for his cardiac foundation at Hollywood's Sony Studios on Saturday night.

Jennie Garth taking her daughters to the carnival at Old Navy's Manhattan Beach store opening on Saturday.

Ashley Green, Kellan Lutz and Nikki Reed partying up a storm at Hollywood's Play House on Saturday night.

Jessica Lowndes celebrating her 21st Birthday with 300 pals at the Hollywood Roosevelt on Saturday night, complete with a tower of Red Velvet cupcakes from Sprinkles.

"Real Housewife" Alex McCord getting poker tips from players competing in the 2009 World Poker Tour at Shrine at the MGM Grand at Foxwoods in CT on Saturday.

Joshua Jackson supporting his girlfriend Diane Kruger at the Hamilton Behind the Camera Awards in Hollywood on Sunday night as she was presenting an award to "Inglorious Basterds" producer Lawrence Ferber. However Jackson bolted before the ceremony even started!

New golfer Adrian Grenier making it to the final round of the putting contest for the Mark Wahlberg Foundation golf tournament only to lose to Bailey Chase from Saving Grace on Monday. After the tournament, guests enjoyed a Glenlivet scotch tasting while waiting for dinner to be served.

Sienna and Savannah Miller hosting a dinner at NYC's Royalton Hotel to celebrate their 2812 Spring/Summer 2010 collection on Monday night.

Shakira celebrating her cover issue of "Rolling Stone" with an exclusive bash at NYC's Bowery Hotel on Monday night, hosted by the magazine and Epic Records.