Britney Spears ...ALMOST ANOTHER WARDROBE MALFUNCTION

Britney Spears finally decided to officially join "The X Factor" -- but she couldn't decide what to wear for the big announcement!

The new judge made two appearances for the show yesterday in NYC for the FOX Upfronts, where she wore two different outfits.

While co-stars Demi Lovato, Simon Cowell and L.A. Reid opted to wear the same clothes for the Upfront and the Post-Party, Britney changed from a short cream dress to a short purple dress -- a dress that almost gave Brit another wardrobe malfunction. Luckily Her fiance, Jason was there to block picture being taken by the Paparazzi...