Spotted!

The Hills' Kristin Cavallari hosted the one-night only AXE Lounge at hotspot 1OAK in NYC. Fresh from the MTV show's season finale, Cavallari was joined by actress Adrienne Bailon, New Moon’s Chaske Spencer, MTV’s Quddus, model Rachel Hunter and NYC socialite Byrdie Bell. Partygoers were treated to a live performance by rapper Wale (Mark Ronson’s protégé), who sang his hit single, “Chillin,”  to the crowd.

Al Roker toasting his new novel, The Morning Show Murders, with Matt Lauer.

Ashlee Simpson celebrated her Broadway debut with sister Jessica and hubby Pete Wentz, who sipped Svedka odka specialty cocktails at an after-party at Inc. Lounge in NYC on Monday.

Christian Serratos from Twilight dined at famed Yellowtail restaurant enjoying Chef Akira Back’s famous Asian-fusion cuisine.

Paula Abdul looking at a Nokia Twist phone at an American Music Awards gift suite and commenting that it was the perfect phone for Simon after she found out it had a mirror in the back.

Lady Gaga at Best Buy in L.A.

Gretchen Rossi, Slade Smiley and Alexis Bellino from the Real Housewives of Orange County partied at Bellagio’s premiere nightclub, The Bank.  The trio relaxed in VIP while pausing to pose with surrounding fans.  At a nearby table sat boxing champion, Floyd Mayweather Jr., who was enjoying his favorite Las Vegas hotspot.

Whitney Port at an Alternative Apparel event at the Private Rooftop Club of the Petit Ermitage Hotel in L.A.

Kris Allen picking up a Vivitar 510 video camera with night vision capabilities at an AMA gift lounge in L.A.

Kirsten Dunst and her family ?at the River Cafe in Brooklyn.

Jennifer Lopez getting her eyebrows shaped at Anastasia Beverly Hills

Robert Downey Jr. and pal Guy Ritchie caught up over dinner at East Restaurant & Lounge in Hollywood

Drew Barrymore and Justin Long at Lucky Strike Lanes & Lounge in Miami.

Latoya Jackson and Demi Lovato at a gifting suite at EVO luxury apartments in downtown L.A.

Jessica Alba and her husband Cash Warren enjoying dinner with friends at Crustacean in Beverly Hills.

Joanna Krupa at Club mur.mur at the Borgata Hotel Casino & Spa in Atlantic City, N.J.

Harry Potter's Emma Watson at Round Hill Hotel & Villas in Monteg.

Brazilian mixed martial arts fighter, Wanderlei Silva, posed for pictures with fans and female friends while partying at Beatles Revolution Lounge in Las Vegas.

Rex Lee from HBO’s hit series Entourage,partied at JET Nightclub in Las Vegas. Coming straight from a Kiss concert, Rex was in Sin City spirits all night, dancing until the early morning hours.