Gwyneth Paltrow bared her abs in a sexy cutout dress and parted her hair to the side at the Hollywood Stands Up To Cancer Event on Jan. 28. Credit: Michael Buckner/Getty Images

Something's… different. Gwyneth Paltrow attended the Hollywood Stands Up To Cancer Event (hosted by Reese Witherspoon and Jim Toth) on Tuesday, Jan. 28 wearing a sexy cutout dress and sporting a rare beauty look!

The Goop founder, 41, flashed her perfectly-toned abs and lean figure in a sleeveless, royal blue dress by David Koma featuring black leather trimming and a cutout bodice. But it wasn't her outfit and tiny figure that created the majority of the buzz.

Paltrow, who typically wears her hair in a center part, transformed Tuesday night with her famous, sleek, straight blonde tresses parted to the side. The Iron Man star also went for a less structured messier 'do at the star-studded event. 

The mother-of-two also kept her makeup to a minimum -- swiping only the tops of her eyelids with black liner and keeping the rest of her face light and ethereal with a coat of lavender shadow.

The star has not been shy about flaunting her flawless figure in the past. One of her most memorable (and daring!) looks to date was her underwear-less, sheer-paneled Antonio Berardi gown at the Hollywood premiere of Iron Man 3 last April. In similar fashion, Paltrow attended Diane von Furstenberg's "Journey of a Dress" exhibition on Jan. 11 wearing a black jumpsuit with a deep plunging neckline.

The blonde actress opted for a more covered-up, low-key outfit at the 2014 Golden Globes the following night where she was joined by her rocker hubby Chris Martin.

Tell Us: What do you think of Gwyneth's latest look?