0910_fno_singleEver wonder what happens on Fashion's Night Out, the industry's biggest night? TooFab has you covered!

Correspondents Caitlyn Becker and Anna Kachikyan were in the two hottest cities -- New York and L.A. -- and provided an insider look at all of Thursday's festivities.

Fashion's Night Out brought out celebrities like Nicole Richie and Rachel Zoe, designers showing off their latest work and of course, throngs of established and would-be fashionistas looking for new inspirations and deals.

Caitlyn takes us on a tour of Bloomingdales' flagship store in New York City during Fashion's Night Out, with celebrity attendee Rachel Zoe.

Check out the madness below:


Meanwhile, Anna was on the West Coast at The Beverly Center, which served as the center for Fashion's Night Out Los Angeles. Nicole Richie, Randy Jackson, and Rachel Bilson were guests.


As a bonus, Anna caught up with designer David Meister and MTV hottie Colton Haynes, who dished on fashion trends for the fall:


Which Fashion's Night Out events did you attend? Tell TooFab in the comments below!