Against All Odds (Take A Look At Me Now) by Mariah Carey featuring Westlife is in Gb at 60 beats per minute and runs 2:20 across 32 bars. It uses 13 chords — Ebm, Ab, Bbm7, Db, Gbsus2, Fm, Ebm7, Gb, 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? Against All Odds (Take A Look At Me Now) guitar melody tab.