How do you put an already published song on audacity? (Ex. American Country Love Song)
If you have the audio file, e.g. .mp3 , can you just drag-N-drop it into Audacity.
If the "already published song" is on a CD you can use Audacity to record what the computer is playing.
http://manual.audacityteam.org/man/tutorial_recording_computer_playback_on_windows.html
or extract the audio data from the CD , aka “rip” the CD , but you’ll need software other than Audacity to rip …
http://manual.audacityteam.org/man/tutorial_how_to_import_cds.html
The advantage of ripping over recording the computer playing the CD, is that ripping is quicker.