Can someone tell me the name of that song, please?

http://www.sounds-hochladen.de/index.php?site=site_downloadfhfileid=1309632195-d6v0f7p3f9-f241

This is a little part of the song that I usually heard on TV.

I know it's kind of rap / hip hop / rb and that it's from the 90's
and that it was / is a popular song.

The only lyrics from this part known are:
"I'm just a ..."

So can someone help me please? It's really important.

You can click on the ->

Sry for my English.

And thanks for answers.