Happy Days Are Here Again by Barbra Streisand is in G at 90 beats per minute and runs 1:47 across 31 bars. It uses 38 chords — Gmaj7, Am7, Bm7, Cmaj7, C6, C, E7, D, and a few more. 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? Happy Days Are Here Again guitar melody tab.