Hard to tell from 'da da dum's' but I know what it's like to have a song stuck in your head without knowing the name. Had that happen with Ride of the Valkyies once. lol

I'd rule out:

Bethoveens 5th, Fur Elise, Ride of the Valkies, Moonlight Sonota,

Best guesses (in order) are (with accompanying website for midi listening):


http://www.mfiles.co.uk/midi-files.htm (site to hear some of the songs)

Schubert's Marche Militaire No. 1

Scott Joplin's The Entertainer

Luigi Boccherini's String Quintet Op.13 No.5

Mozart's Minuet and Trio in G (K1)



http://www.geocities.com/Paris/3486/ (site to hear some of the songs)

Beethoveen's Rondo a capriccio Op.129, has a catchy chopsticks like tune.

Mozart's Sonata, in A maj K.331 Mvt. 3, also has catch chopssticks like tune.

Hope that helps some.