Bella & Gigi Hadid Celebrate YouTube Fashion Launch in NYC

Bella and Gigi Hadid pose with Serena Williams inside the launch of YouTube.com/Fashion on Monday night (September 9) in New York City.

The trio of celebs were joined at the event by Derek Blasberg, Jennifer Lawrence, Kendall Jenner and YouTubers Patrick Starrr, Amanda Steele and James Charles, among many others at the bash.

PHOTOS: Check out the latest pics of Bella Hadid

Earlier in the day, Bella and Gigi were spotted heading to a fitting appointment at the Marc Jacobs‘s offices after attending a couple of fashion shows the night before, including TommyxZendaya‘s new collection launch.

Check out 30+ pics inside of Bella and Gigi Hadid at the YouTube Fashion launch…