TGIF! Last night, Rachel Bilson partied with Uncle Karl, Kylie and Kendall Jenner went to 'Prom' and Jennifer Hudson stayed chic across the pond. Check out the most stylish soirees!

It was a big night out! Scarlett Johansson, Zoe Saldana and Camilla Belle hit the Coach party in LA, while Jennifer Hudson promoted her new album in London. Plus, hang out with Megan Fox and Selita Ebanks!

While Katy Perry and Russell Brand made starry eyes at the London 'Arthur' premiere, Kylie Minogue and Keke Palmer made a play for pants. Also catch up with Beyonce and AnnaLynne McCord!

Whitney Port readies for spring in flirty floral shorts, Elizabeth Hurley launches a bikini boutique and Gwyneth Paltrow glows in Vionnet. See the day's most stylish stars!

While Reese Witherspoon and Robert Pattinson raised the curtain on 'Water for Elephants,' Vanessa Hudgens, Katy Perry and Kate Bosworth rocked out in style at Coachella. Plus, catch up with Heidi and Halle!

While Audrina Patridge celebrated the single life in a sultry LBD, Elizabeth Hurley shimmered at the Hot Pink Party. Plus, catch up with Michelle Monaghan, Hailee Steinfeld and Lake Bell!

Hollywood's most fashionable never let us down! From Kim Kardashian in a delectable red dress to Fergie in a signature edgy frock, last night's events oozed with style. Check it out!

While Rose McGowan and Kerry Washington got dressed for the ball, Kylie Minogue wrapped her world tour and Minka Kelly proved why she's the sexiest woman alive. Check out today's hottest party pics!

While Olivia Palermo and her beau were crowned couple royalty, the Kardashian clan hit the red carpet for 'Redbook.' Plus, Emma Roberts and Hayden Panettiere make us scream for style and Conde Nast's Hot List heats up LA!

The weekend was hot in Hollywood, where Eva Longoria played gala hostess and Paris Hilton and Fergie got glam for a good cause. Plus, Anne Hathaway geeks out at the LA premiere of 'Rio.'

While Emmy Rossum launched her namesake bag at Elie Tahari, Kristin Cavallari, Stephanie Pratt and Chloe Sevigny showed off their flawless skin at Kiehl's. Plus, Nicki Minaj takes her hair to new heights and Karl Lagerfeld gets cloned. Let's party!

It was a night filled with royalty, indeed! From pop princess Kylie Minogue to Duchess Fergie and R&B queen Toni Braxton, there was more than enough high style to go around. Check out how entertainment's crown jewels partied the night away!

While Renee Zellweger represented all-American style in Milan, Naomi Campbell and Sophie Ellis Bextor made a case for London cool. Plus, wake up with Christie Brinkley and hit the shops with Bar Refaeli!

While the unbreakable Kardashian krew launched a new fragrance, Penelope Cruz gazed at her new star on Hollywood Boulevard. Plus, Paris Hilton puts on the glam for the Oxygen Network and Eva Longoria hits the stage at Letterman. Check out the day's most fashionable stars!

The weekend's award shows brought the stars at full shine! Country vixens Taylor Swift and Carrie Underwood were glam at the ACM Awards, while Heidi Klum got slimed at the Kids' Choice Awards! Plus, catch up with the Smiths and the Kardashians!