"Allegro con brio" from Symphony No. 5 in C Minor, op. 67, featured in The Breakfast Club, Fantasia 2000, Immortal Beloved, Austin Powers, Cat on a Hot Tin Roof
Ludwig van Beethoven (editorial comment: yes, this is the famous dah dah dah DAHHHH; and, wow!)

Long live the music, Jackie. We used to have a type of margerine called 'Brio'. This in combination with 'The Breakfast Club' made me laugh. I've always only seen it written as 'con brillo'. But looking up 'brio' it seems to be allright.