I have a MP3 named "Come On Eileen" by No Doubt.....?

Did No Doubt ever record this song?

I also have a version by Save Ferris, Is it the same song but tagged wrong?

It's actually the Save Ferris version.
According to this site, their version is often confused with No Doubt.
http://en.wikipedia.org/wiki/Come_On_Eil...

Sky Ferris did a cover of this song, but I don't think that No Doubt ever did. It's probably the same the song.

The original version is from 1983 by a band called Dexy's Midnight Runners. I don't see on No Doubt's discography that they covered the song, but Save Ferris did.

Other bands have done a cover of Come On Eileen but the original by Dexy's Midnight Runners is still the best!