Find the music you want, Save it using a youtube saving site such as keepvid.com
; Convert the video into an mp3 using media-convert.com
. Right click>open with>iTunes. On the song. Right click the song and click on Get Info from the click menu. Go to Google Images and get the album artwork and add it to the song's info. Sync your ipod and you've now got a song looking no different from other music.