Many sites, such as the Free Music Archive or Jamendo , offer legal free MP3 downloads.
Once I know, I can help you find a source for that specific file! Feel So Good Mp3
Based on your request, it seems you are looking for information or a "paper" (article/document) regarding an MP3 of a song titled "Feel So Good." Many sites, such as the Free Music Archive
Information exists on how to convert research papers (PDFs) into MP3 audiobooks. Feel So Good Mp3