Here We Go Again by Demi Lovato is in Bb at 142 beats per minute and runs 3:17 across 71 bars. It uses 12 chords — F5, Dm, Bb5, D5, Gm, Bb, E5, C, 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? Here We Go Again guitar melody tab.