This is the extra long music video length version of the song that they showed on TRL.

Britney Spears travels through various decades singing and dancing for Pepsi under the current hip trends of the times. I watched the Superbowl with my Britney-obsessed girlfriend at the time ONLY for this commercial, downloaded it afterward, and basically saw and watched it about 300 times.

Allegedly Britney’s three favorite eras — “Doo Wop,” “Surf’s Up” and “New Millennium” competed among fans for airtime later in the show and on tv as the segments were aired as separate commercials.

An online sweepstakes and charity auction offering props and costumes from these commercials and Spears’ first Pepsi ad is being held in tandem with the new campaign. “Now and Then” memorabilia will hit the auction block at halftime with proceeds benefiting the Britney Spears Foundation. (source: MTV.com)

Commercial veteran Joe Pytka, who directed the “Now and Then” campaign, helmed music videos for the Beatles’ “Free as a Bird,” John Lennon and Yoko Ono’s “(Just Like) Starting Over” and Seal’s “Fly Like an Eagle” from the movie “Space Jam,” which he also directed.