serching a way that works to remove vocals from a mp3

i have 2.0.5 version i i followed tutorial saying -split stereo -than effect inverse- than mono and the voice is stil loud and clear.
the song looks like daddy cool song with male voice and female voice. I tried with this song also and did not succed.

anyone can remove vocals with audacity for a song like this

Probably not.
See here for information about removing vocals: Tutorial - Vocal Removal and Isolation - Audacity Manual
Note the emphasis in the opening paragraph:

some > stereo tracks, > may > allow you to remove or isolate vocals