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Britney, 31, who dressed as a schoolgirl for the iconic video, topped a poll of over 9,000 music fans by e-magazine AMAZEPOP.

In second place was Bring It All Back by S Club 7, while Sweet Dreams My LA Ex by their former member Rachel Stevens, now 35, came in third.

Girls Aloud’s 2002 Christmas No1 Sound Of The Underground was fourth followed by Wannabe by Spice Girls.