Justin Bieber's latest 'Music Mondays' single proves that even a pop super star who jets around the world can have a "Bad Day." 

The soft acoustic ballad is clearly a way for Justin to work out a hard breakup that he couldn't shake. 

"Though i didn't think you would let me down that easy/Oh no girl/ ANd i didn't' think it was over until you walked away/Like it was nothin' baby," are just some of the lyrics in this latest song.