What is the difference between MP3 and WMA?
They are two different audio formats.  MP3 files tend to be larger in size and have better quality, while WMA (Windows Media Audio) are low quality audio files that are most suitable for streaming.  WMA is highly recommendable for websites that post copyright audio.

Why do you put my remixes on this site? I didn't submit it!
Members can submit remixes to us and it's just NOT possible for us to research every remixes we receive.  Please keep in mind that every files you post once on a site can be trade on Internet and become available on P2P programs.  Some users can easily erase tag or even replace it with their names! 
If you see your remixes in this site and you don't want them to be here, please write an email to resource@christinamultimedia.com and we'll remove them.

Why must Official Remixes be in Windows Media Audio?
Copyright Laws, plain and simple. If we were to post a high quality official remix, people would not bother to buy the singles to support Christina.  The other downside is the RIAA could threaten to close down Remix Resource, so that is why we cannot post them in high quality.