Sweet Sweet Smile by Carpenters is in D at 160 beats per minute and runs 2:21 across 48 bars. It uses 8 chords — D, Bm, G, F#m, A7, A, F#m7, G6. 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? Sweet Sweet Smile guitar melody tab.