“Bad Day” is a single by Canadian recording artist Justin Bieber. It was released on November 4, 2013.
Background 
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There are times in relationships where things aren't going well, where you know something isn't right. But when you're in love, you feel like no matter what, you'll make it work...until the day comes where the other person doesn't feel the same way and walks out. That day - the day where everything you were willing to fight for is gone - is what Bad Day is all about. - JB
Poo Bear released the song in 2012 on his EP #Beats2BreakUp2. Poo Bear later gave the song to Justin which has a slightly different melody and lyrics. It has interplotations of the Isley Brothers' “Footsteps In the Dark”, which was famously sampled on Ice Cube’s “It Was a Good Day”.
Audio Edit
Lyrics Edit
No 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 nothing, baby
And that moment was so hard for me to breathe, yeah
Cause you took away the biggest part of me, yeah
Life is so unpredictable, yeah
Never thought a love like yours would leave me all alone oh no
Didn't waste any time
Like you had already made up your mind
No sympathy
Cause I was out of line, oh yeah
But 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 nothing girl
It was a bad day!
Hey hey hey...
I know I was wrong
But you could've said goodbye baby
It was a bad day
Now I'm like whoa
It was a bad day
It was a bad day
It was a bad day
