Liam Hemsworth and Miley Cyrus
01/12/2010 AT 06:00 AM EST
Fresh off an Australian vacation, Miley Cyrus
and boyfriend Liam Hemsworth
looked "very much like two kids in love," an onlooker tells us, during dinner at Sashi Sushi and Sake Lounge in Manhattan Beach, Calif. The duo shared a plate of miso calamari, and "were very affectionate with each other, laughing, giggling and being very touchy-feely," the onlooker says. "It was very sweet."
from The Hills
to celebrate her 23rd birthday in style at Eva Longoria Parker
's new Las Vegas nightclub, Eve. The starlet arrived for her bash around 11 p.m. – and was presented with a birthday cake and a parade of sparklers just after midnight. Cavallari, in a purple strapless dress, danced, sipped champagne and celebrated with her friends late into the night.
Despite the chilly 35-degree temperatures, Jersey Shore
star Nicole "Snooki" Polizzi
showed up to host a party at the Opium Hard Rock in Hollywood, Fla., in a black tank top, though she downed some Southern Comfort to warm up once she got inside. The reality star also warmed up the crowd, doing her signature fist pump and scoping out the scene. "She was telling people she wanted to meet hot guys, so she kept using bronzer throughout the night," a source at the club says. Adds the source: "She eventually took to the [stripper] pole, showing the crowd her skills [and] gyrating for an hour." Later, Snooki continued the party at the Louis Bar inside the Gansevoort South in Miami Beach.
got a little inspiration from a fan while preparing for her hike in Hollywood's Runyon Canyon. After parking her black Bentley at the entrance to the trail, the actress was recognized from across the street by a fan who yelled, "I love you, Melanie Griffith!" And the actress returned the affection, then stretched and headed up the steep hill.
By REAGAN ALEXANDER, LINDA MARX and LESLEY MESSERMonday's Couples Watch >