Jessica Biel

Justin Timberlake and Jimmy Fallon kept the party going at the Time 100 Gala in NYC last night. The two friends, who were named two of the magazine's 100 most influential people in the world this year, were joined by Justin's wife, a Tom Ford-clad Jessica Biel, and a Lanvin-wearing Claire Danes. Also out were honorees Lena Dunham and Vice President Joe Biden, who took the chance to work the room of Hollywood stars. Other guests included Amy Poehler, Steven Spielberg, Daniel Day-Lewis, and Christina Aguilera, who performed at the event and hobnobbed with Lena on the red carpet.

Inside the bash, the stars wasted no time celebrating the honorees. Justin and Jimmy danced around the room and goofed off with Amy and musician Frank Ocean. Lena commented on getting on the Time 100 list, saying that the first person she told about being on the list was her father. She said, "I called my dad because he was a layout editor at Time in the 1970s, so I was super psyched, and I wanted to tell him that I was making good in his former institution. I heard there was a drinks cart when he worked there." Meanwhile, Daniel, who picked up the best actor award at this year's Oscars, commented that he is "more than mildly astonished" that he landed on the list.

The annual Time 100 Gala inspired another round of red carpet glamour, with Jessica Biel and Olivia Munn leading the star-studded pack. And what better occasion to dress to the nines than in honor of some of the world's most influential people? With Biel in black, head-to-toe Tom Ford, Munn in bright canary-yellow Michael Kors, and Claire Danes in a more exotic Lanvin look, the night played host to a spectrum of black-tie ensembles. Lena Dunham wore a shimmery number from Saint Laurent's much-discussed Saint Laurent Fall '13 collection and Christina Aguilera went the siren route in formfitting Victoria Beckham. To get all the details on who wore what at last night's party, keep clicking.

Many celebrities have walked down the aisle without saying "I do," and we're taking a look at all of the stars to slip on a bridesmaid dress over the years. Cameron Diaz, Britney Spears, Jennifer Garner, and more have shown their support for their closest pals and loved ones on their wedding day. Click through to see all of the snaps of your favorite stars as bridesmaids, and in the spirit of wedding season, be sure to take a look at our ultimate celebrity wedding gallery too!

NYC's Spring galas, the Tribeca Film Festival, and CinemaCon, coupled with the usual premieres and Hollywood parties, made this week one of the most glamorous in recent celebrity-style history. As if Gwyneth Paltrow's Iron Man 3 promo tour hadn't already safely supplied a number of looks to inspire (and gush over), she joined a crew of the chicest kind at last night's Tiffany & Co. Blue Book Ball, giving us another round of enviable gowns. Add to that a red-carpet arrival from Jennifer Aniston at this week's premiere of Call Me Crazy and Emily Blunt in a showstopping gown at Arthur Newman's LA debut, and it's not hard to see why this might just be one of the best-dressed weeks on record. For all the rest of the style proof, just keep clicking.

Gwyneth Paltrow took a break from her promotional duties for Iron Man 3 to party with Sarah Jessica Parker, Kate Hudson, and many more A-listers at Tiffany & Co.'s Blue Book Ball in NYC last night. She wore a blue Ralph Lauren gown as she mingled on the carpet and inside the party with a Reem Acra-wearing Kate; SJP, who wore a vintage Vicky Tiel gold frock; and Jessica Biel in a navy Elie Saab number. Meanwhile, Carey Mulligan wore a Victoria Beckham black suit at the bash, which featured jewels that were designed for her new film, The Great Gatsby, and chatted with an elegantly dressed Michelle Williams, who donned a dress by Katie Ermilio. Naturally, all of the ladies wore jewels by Tiffany & Co.

Gwyneth had to miss out on the London premiere for her new flick, which took place yesterday after getting rescheduled due to Margaret Thatcher's funeral earlier this week. However, she did fit in press duties while in the UK, including making an appearance on The Graham Norton Show and getting cute at a photocall with her costar Robert Downey Jr.

Tiffany & Co. hosted its 1920s-themed Blue Book Ball in NYC last night, which in turn inspired a seriously glamorous attendance list. Falling in line with the brand's theme and signature color, Kate Hudson stunned in a strapless, Tiffany-blue Reem Acra Resort '13 gown and sparkling diamond earrings. Gwyneth Paltrow opted for a cooler blue hue, wearing a long-sleeved Ralph Lauren gown with a jeweled butterfly brooch, and Jessica Biel showed off her love for Spring prints in a gorgeous floral-patterned Elie Saab gown and diamond-crusted hair brooch. And that's just the beginning. Click through the slideshow to see the rest of the chic celeb pack — including Sarah Jessica Parker, Carey Mulligan, and Michelle Williams — along with a behind-the-scenes glimpse at the swanky party scene inside.

This week in the world of social media, celebrities stayed busy sharing their cute candids from the MTV Movie Awards, Coachella, and more! Miranda Kerr and Bar Refaeli both soaked up the sun in their native countries, while Lea Michele showed off her yoga moves during an LA hike. Ashton Kutcher showed his support for the city of Boston by snapping a photo in a Red Sox cap, and his former That '70s Show costar Wilmer Valderrama spoke at the White House to champion immigration reform.

Click through to see the rest of this week's cutest celebrity candids, and be sure to follow POPSUGAR on Instagram, Facebook, and Twitter!

Justin Timberlake and Jessica Biel played a round of golf at Justin's Mirimichi Golf Course in Millington, TN, yesterday. The couple are in Justin's home state of Tennessee following some excitement last week that took them to Washington DC. Justin visited the White House for a day dedicated to Memphis soul music. He kicked things off Tuesday with a Q&A session hosted by First Lady Michelle Obama, and later took the stage at a special musical event with the president in the front row — Justin's rendition of "(Sittin' on) The Dock of the Bay" even got the president and first lady singing along!

Apparently, Justin and Jessica stuck around the capital to sightsee. She tweeted Thursday about viewing the city's famed cherry blossoms as well as the Martin Luther King, Jr. and Abraham Lincoln memorials. All the pavement pounding apparently worked up an appetite. Jessica also tweeted, "When sightseeing, all I want is a tray that hangs from my neck with a hot dog and a white wine spritzer on it. Is that too much to ask?"