It's an ETonline exclusive: As we count down to the September 2nd premiere of The CW's new "90210" spin-off, get ready for our "Beverly Hills, 90210" video flashback.

Every day we will be debuting an exclusive clip from the original series starring Shannen Doherty, Jennie Garth, Tori Spelling, Luke Perry, Jason Priestly, Brian Austin Green, Ian Ziering and Gabrielle Carteris.

Oh, no! They didn't!: Today's clip is from season one's "Spring Dance" episode in which Brenda (Doherty) and Kelly (Garth) experience a fashion faux pas when they show up to the West Beverly dance in the same dress.

Before the launch of the new series, SOAPnet will celebrate the original Aaron Spelling show with a 24-hour marathon, starting at midnight on Monday, Sept. 1 -- with ETonline giving you a sneak peek of the episodes that will air!

Then, on Tuesday, Sept. 2 at 8 p.m., the all-new "90210," starring Rob Estes, Lori Loughlin, Shenae Grimes, Tristan Wilds and Jennie Garth will premiere with a special two-hour episode on The CW when the Wilson family moves to Beverly Hills.