Buttons by Pussycat Dolls featuring Snoop Dogg is in Gm at 100 beats per minute and runs 3:26 across 62 bars. It uses 4 chords — N.C., Dm, A7, Bb5. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? Buttons guitar melody tab.