Geri Halliwell of Spice Girls stopped by The Tonight Show Starring Jimmy Fallon and told the story behind how she made the decision to wear the now-famous Union Jack dress at the 1997 BRIT Awards.

Just in time for the Spice Girls tour to kick off, Geri Halliwell has returned to her ... has dyed her hair back into the nostalgic, bright red shade that she was famous for.