THIS IS the right tag! It doesn't include feat. on the CD.  + the whole putting feat. in the track-title i stupid 'cus it (almost) only applies for singers (that are well known of course). What about all the other people in the process? Song-writers, musicans, producers... What if Nicki Minaj played/programmed drums for this track (absurd thing that never could happen, but it's just a thought)? Would you still tag it feat?