The background of this is rather sad :
Crazy Frog is an invention of one of these companies that pickpocket juveniles by selling cheap-made but expensive ringtones and logos and stuff for their mobile phones - they invent a figure like the frog and hype it until it is "megacool" to have one on the mobile - until the next figure comes a few weeks later and the same kids spend cash again....
"Axel F." is the associated ringtone. The REAL sad thing about it is that this plagiarism made with 2 tones and one computer voice made #1 in the charts - at least in Germany and Austria.
Sort of shows how "good" the music industry is today
