Naman8or
Where did you get just the vocal of that song?
go to youtube video with just the song on it
go to youtube with the song you want to put it with on it
google "youtube to mp3"
first link
download songs
download audacity
download the 'lame_cll' thing (search on google)
line up the songs
set the tempo
export as mp3
go into whatever video editing program you have (windows movie maker, if default)
set a picture to go with music
upload to youtube.
that's the whole process.