Beyonce Knowles lost her usual poise for a moment on Tuesday at a concert in Florida - but ever the star, bravely carried on with the show.The incident was captured by an unnamed fan, who posted the accident on YouTube this week. It shows the R&B superstar in full-flight during a dance routine for "Ring The Alarm" at the Amway Arena, before losing her balance and tripping on her long red dress, falling down 12 steps head first.However, despite almost hitting her head and bashing her arms in the fall, Beyonce picked herself up and leapt straight back into the high-energy dance routine.One concert goer handed her camera phone footage to a local TV station, and the clip subsequently surfaced on video sharing site YouTube. The unnamed woman told WKMG-TV, "As she proceeded to come down the stairs, she tripped on her coat and it seems like she fell on her collarbone and face."SonyBMG are currently lobbying YouTube to have all video clips of Beyonce's tumble removed from YouTube, although several still remain in circulation this morning (July 26).