Feb. 12, 2007 | 06:00 PM EST

Caught in the Act: Grammy Parties Edition!

Scarlett Johansson Photo by: Jason Squires / WireImage
Caught in the Act: Grammy Parties Edition! | Scarlett Johansson
Scarlett Johansson, ducking into a private alcove at the Warner Music Group post-Grammy party at downtown L.A.'s Old Church at 2 Main (formerly The Cathedral), before she and a girlfriend hunkered down over their own tray of hors d'oeuvres. Meanwhile, James Blunt and girlfriend Petra Nemcova mingled for a little bit before heading for one of the unclaimed heating vents that was warming up the tented area. "I can feel the heat!" the happy supermodel exclaimed.

John Mayer, planting a tender, sweet kiss on Jessica Simpson when she arrived at the Sony BMG Post-Grammy Party at the Beverly Hills Hotel, and later stroking her back and holding her hand in the cabana that also housed Simpson's sister Ashlee and others. Champagne flowed and Mayer lip-synched Terence Trent D'Arby's "Wishing Well" to Jess. And the Dixie Chicks, John Legend and Carrie Underwood feasted on crab legs, roast beef and raspberry tarts in the white-themed bash (calla lilies, white cabanas, white seating) while Chris Daughtry, spent the entire night roaming the ballroom and trying to take photos with celebrities.

Leonardo DiCaprio, sporting a baseball cap and smoking in the special patio area of the William Morris Agency post-Grammy party at a Bel Air mansion. With loud reggae, hip-hop and classic rock songs from DJ Adam 12, the gathering featured an on-premises Pink's hot dog stand and Gwen Stefani, Gavin Rossdale, Akon, Common and Natalie Cole making the scene. Diddy made a grand entrance with two bodyguards around 12 a.m., but, this being L.A., people seemed too cool to care.

Vanessa Minnillo, giving boyfriend Nick Lachey a lap dance to Tony Yayo's "I Know You Don't Love Me" at the XM Satellite post-Grammy soiree hosted by Queen Latifah, Ludacris and Terrence Howard at Social Hollywood. Also whooping it up – and indulging in pineapple, pomegranate and cranberry margaritas from the Margarita King and Ecstasy vodka cocktails: Ryan Phillippe, Kevin Federline, Destiny's Child's Kelly Rowland and Michelle Williams and pregnant My Name Is Earl star Jaime Pressly.

Mandy Moore, reviewing her favorite Grammy outfits at EMI's post-Grammy party at Hollywood's Boulevard 3. "I loved the Dixie Chicks," she told us. "They could do no wrong in my book, like musically, stylistically." (And of her own vintage ensemble: "I bought this (dress) two weeks at the flea market in Paris with nothing in mind. I just I liked the dress.") American Idol judge Randy Jackson did some assessing of his own, too. "Carrie who?" he joked about Carrie Underwood. "Best new artist, yes. Love her. She's got the biggest Idol album debut record ever. Five million copies now. It continues to validate the show." OK GO, Natasha Bedingfield and KT Tunstall also made the scene.

Sting and Police drummer Stewart Copeland, cursing in a mock spat at the Grammy Salute to Industry Icons afterparty at the Los Angeles Convention Center. "What tour?" Sting demanded about the much-discussed reunion of the band. And Copeland admitted he was nervous that the reformed group would "screw up completely," but ended up happy with their show-opening rendition of "Roxanne." "We came away thinking, 'Hey, we did pretty good' " he told us.

Beyoncé Photo by: Michael Caulfield / WireImage
Caught in the Act: Grammy Parties Edition!| People. com Franchises, Actor Class,
Beyoncé, assessing her Grammy show performance at a Grammy party she cohosted with PEOPLE at West Hollywood's Eleven. "It was very simple, no production. It was just about the song," she said. "Prince introduced me, and I didn't know he was going to do that." (As for what she'll do at the Oscars on Feb. 25: "I am going to perform with my girl Jennifer Hudson, Anika (Noni Rose) and Jamie Foxx. It's going to be incredible.") Revelers John Legend (who brought his mom as his date), Christina Aguilera, Mischa Barton, Bow Wow, Dane Cook and Jermaine Dupri snacked on chocolate-covered strawberries and ahi tuna as A Tribe Called Quest's Q-Tip spinned hits from the Notorious B.I.G., The Doors, Bob Marley and ladies of the evening, Beyoncé and Mary J. Blige.

• By CARRIE BELL, HOWARD BREUER, VANESSA DIAZ, AMY ELISA KEITH, KIMBERLY LANSING, JENNY SUNDEL, MICHELLE TAN and NICHOLAS WHITE