Spotted!

Whitney Port sampling cupcakes with Pepsi-flavored frosting for the Pepsi Natural Dinner at a private estate in East Hampton, N.Y. After a Pepsi Ice Cream Floats guests danced off their caffeine-high at Lily Pond.

John Mayer doing an impromptu performance of "Your Body is a Wonderland" during Chris Evans' birthday party at Brett Gursky and Adam Franklin's Saturday night at MyHouse in L.A.

Chace Crawford, Leona Lewis, Amanda Bynes and Jamie Lynn Sigler among the guests who attended talent manager and producer Eric Podwall's birthday party at Jane's House in L.A. where guests imbibed in Svedka cocktails, toasted with Barefoot champagne and were given Orbit Mist Gum to cleanse their palettes.

Zac Efron at Childrens Hospital Los Angeles for Marnie Rocks "Beading" Cancer day.

Julianne Moore at Gigi Levangie Grazer's party to celebrate the release of her fourth novel, Queen Takes King at Mr. Chow Tribeca.

Lindsay Lohan carrying a SmokeStik e-cigarette compact while at dinner with friends at Cecconi's in West Hollywood.

Mekhi Phifer munching on the honey walnut shrimp during the First Food & Bar opening at The Palazzo in Las Vegas.

Bill and Giuliana Rancic relaxing at the new luxury pool experience at The Palazzo, AZURE, after a fun-filled weekend of gambling, shopping and partying at The Palazzo Las Vegas. The couple was at the resort filming their new television show, Bill and Giuliana: After Tying the Knot for the Style Network and enjoyed side-by-side massage by Canyon Ranch SpaClub. After their day of filming, Bill and Giuliana dined at the Italian hot spot LAVO before heading up to the LAVO nightclub.

Newly single Paris Hilton had a girls' night out at Borgata Hotel Casino & Spa's club mur.mur in Atlantic City after dinner at Izakaya.

Ice-T and his wife b shopping at LIVE! On Sunset in Hollywood.

The Beat Freaks from MTV’s America’s Best Dance Crew took to the hardwood, at JET Nightclub in Las Vegas, for a performance on Friday night while Britteny Starr from VH1’s Rock of Love looked on.

Shannon Elizabeth stopped by YELLOWTAIL restaurant on Saturday night in Las Vegas and on Sunday night, NHL sensation, Wayne Gretskey was joined by friends at the Japenese eatery.

On Saturday, June 13, Justin Timberlake celebrated the launch of his new Tequila, 901, at NYC hotspot TENJUNE. Justin sipped on several specialty 901 tequila cocktails, including The Millington, named after Justin's hometown in Tennessee.

MLB superstar Jose Conseco enjoying a night out in Las Vegas at the Beatles Revolution Lounge at The Mirage hotel on June 10.

Two-time winning Dancing with the Stars champion Cheryl Burke splurged on summer makeup at the Napoleon Perdis Hollywood Flagship Store on June 10th.

TV ersonality A.J. Calloway hanging at a VIP table, next to the DJ booth at TENJUNE along with Zak DeOssie from the New York Giants and Cheryl James, aka Salt of Salt-N-Pepa.

Jamie Foxx jumping on the mic at SKYBAR in LA after the DJ on threw on his hit "Blame it on the Alcohol." Ironically Jamie was drinking water.

Jon Bon Jovi and Renée Zellweger indulging in a plate of smoky Chipotle Guacamole at the Blue Parrot in East Hampton

Sarah Silverman drinking Fiji water at the Cinevegas Opening Night after-party at Prive in Las Vegas.