Flex and Britney Spears. Not exactly the most obvious combination in the world. However, Britney Spears and MTV are launching a contest that allows anyone to remix videos of her to her new single Piece of Me. The remixing is done with the MTV Video Remixer, developed using Adobe Premiere Express, a Flex based application written by Adobe and licensed to MTV. This follows on similar contests done by MTV for artists such as Kelly Clarkson and Nelly Furtado.

Britney herself will decide the winner of the contest. Submissions are due December 14th - the winning video will be premiered on MTV on December 20th. Get your entries in soon.

YouTube has launched an online editor built by Adobe: YouTube Remixer. The application, also known as Adobe Premiere Express, was written by Adobe using Flex, and is nearly identical to Photobucket's Remix tool. Adobe Premiere Express allows online video sites to embed an editor, built by Adobe, into their site so users can easily more complex videos, with transitions, music, photos and titles.

TechCrunch has some more details, along with a few interesting comments.