Waking Up In Vegas by Katy Perry is in Bb at 133 beats per minute and runs 3:00 across 56 bars. It uses 7 chords — F, C, Dm, Bb, Dm7, Eb, Gm7. 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? Waking Up In Vegas guitar melody tab.