After looking at the file of the song I wanted to use, it says it's an .m4a

So I guess my new question would be, can I convert that into an mp3? And what exactly is a m4a?
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Old question:
Does anyone know where I can find a mp4 to mp3 converter?
I've tried looking on download.com but I haven't found anything.

I need one because Windows Movie Maker doesn't allow me to import mp4 files.

I assume you are aware a mp4 is a video + audio file... and a mp3 is purely an audio file.

I did not!

So that would mean there is no converter?
Oh geez.

THe m4a isn't even a mp4 file. But a simple search found this. Hope it will do what you are after. And its free from a reputable source.

Free Convert M4A to MP3 AMR OGG AAC Converter - Free software downloads and software reviews - CNET Download.com

Thank you so much! =)

There is also a very good one that starts as a trial and then reverts to free after a bit, called dbpoweramp music converter. Their page also links to extra codecs for handling other formats and there is also an all in one bundle of codecs you can get.

You can check for free programs here as well: Best Free Audio / Video Format Conversion Program