Need help removing music

I have an audio of people talking while music is playing in the room. I found the exact version of the song on itunes and downloaded it. I put the talking/music in one track in Audacity, and put the clean version of the song from itunes in another track. I synced them exactly, then used invert on the clean version, but it did not cancel out the song. It had no effect. Any idea how to remove a song (both vocals and instrumentals)? I am using windows 10, Audacity 2.2.2.

Instead of invert-method, make the tracks into stereo-pair(s) and apply Audacity’s “Vocal reduction & Isolation”. The option you need is “remove center”.