Nicole Richie -- this side of purple hair: Now pair that with side boob and sheer panels down the entire side. Need we say more? Well, sure, she wore Donna Karan.

Jake Gyllenhaal and sister Maggie Gyllenhaal get snuggly: Yeah, the sibling PDA was pretty much adorable.

Gisele Bundchen and Tom Brady return: The latest edition of how to be rich, flawless and fabulous. Plus they smooched in public.

Kate Upton can't make this medicine go down: The Sports Illustrated Swimsuit model had some weird "Mary Poppins" thing going on with her black trumpet gown and inexplicable headpiece from Dolce & Gabbana. Why, why, why?!

Brie Larson is a risk-taker: Not everyone can pull off a heavily beaded golden tunic and matching pants quite like she can. The look came via Prada. Gabrielle Union took a similar approach with a bedazzled crop top and matching midi-skirt, also from the Italian fashion house.

Katie Holmes: Marigold banana, or Belle from Disney's "Beauty and the Beast"? That is all.

Neil Patrick Harris and David Burtka love costumes! And so it was demonstrated when the "How I Met Your Mother" star donned a cummerbund as tall as a corset and Burtka took argyle to a whole 'nother level in a head-to-toe patterned tux. Built-in cape-tails sold separately.

Top o' the mornin', Carmelo Anthony: The basketball star, accompanied by wife Lala Vazquez, donned a topper and tails and we must say, we fancy the look.

Crop tops galore: Emma Stone, Anne Hathaway, Gabrielle Union, Rihanna and Cara Delevingne all partially bared their bellies (or lack thereof) for the occasion.

Who are you wearing? She's right next to me! Stars often pose at the gala with their costume designer, and British designer Stella McCartney was able to round up a few A-listers -- Reese Witherspoon, Kate Bosworth, Cara Delevingne -- for her red carpet photo op.

Also setting off cute-couple alerts: Actress Blake Lively and hubby Ryan Reynolds hit the red carpet together, as did "Homeland" star Claire Danes and husband Hugh Dancy; singer John Legend and Chrissy Teigen, "Breaking Bad's" Bryan Cranston and wife Robin Dearden, Oscar nominee Chiwetel Ejiofor and wife Sari Mercer, comedian Sarah Silverman and beau Michael Sheen, actor Eddie Redmayne and his girlfriend Hannah Bagshaw, Ed Burns and Christy Turlington, Hugh Jackman and wife Deborra Lee Furness, Jim Parsons and boyfriend Todd Spiewak, "Amazing Spider-Man 2" duo Emma Stone and Andrew Garfield, Seth Meyers and his wife, Alexi Ashe, and Charlize Theron and Sean Penn. Ed Norton also made a rare red carpet appearance with wife Shauna Robertson.

Karolina Kurkova brings the 'tude. And the volume: The model wore a voluminous, structured floral gown by Marchesa and rocked that red carpet like it was the only runway in the world. (And not much else besides that gown fits in the world).

Rosie Huntington-Whitely didn't get the memo: Or so we think. The "Transformers" actress was one of the few who wore a short dress on the red carpet. To be fair: The leather, leopard and gladiator-like pleats definitely made a loud statement. Lena Dunham, Lea Michele, Michelle Williams and Elizabeth Olsen also went with knee-baring frocks.

The red carpet parade also included Rachel McAdams, Anna Kendrick, Zoe Saldana, Idina Menzel, Shailene Woodley, Emmy Rossum, Allison Williams, Katie Couric, Benedict Cumberbatch, Matt Bomer, Dakota Johnson, Diane Kruger, Cobie Smulders, Selena Gomez, Jessica Alba, Dianna Agron, Sarah Paulson, Amy Adams, Rashida Jones, Zooey Deschanel, Hayden Panettiere, Shaun White, Kristen Wiig, Kristen Stewart, Kate Mara, Mary-Kate and Ashley Olsen, Frank Ocean, Florence Welch, Kristen Dunst, Marion Cotillard and Olivia Munn, among many others.

Someone who was noticeably absent? Gwyneth Paltrow consciously uncoupled with the annual bash. Last year, the GOOP founder basically bashed the punk-themed high-fashion affair and claimed she'd never go again. This year, her rep said she would "not be in New York and is unable to attend the ball," Radar Online reported Monday.

On Monday morning, fashionable First Lady Michelle Obama joined a bevy of designers, including Calvin Klein, Oscar de la Renta, Michael Kors, Diane von Furstenberg, Donatella Versace, Carolina Herrera, Marc Jacobs, Donna Karan and Ralph Lauren, to inaugurate the museum's new $40-million costume center: the Anna Wintour Costume Center, named after the Vogue editrix herself, according to the Associated Press.