It Must Have Been Love és una cançó del duet Roxette, format per Marie Fredriksson i Per Gessle, que n'és el compositor. El 1989 Touchstone Pictures es va posar en contacte amb ells perquè es convertís en la banda sonora de la pel·lícula Pretty Woman.
It must have been love but it's over now.
Lay a whisper on my pillow
Leave the winter on the ground
I wake up lonely, there's air of silence
In the bedroom and all around
Touch me now, I close my eyes and dream away
It must have been love but it's over now
It must have been good but I lost it somehow
It must have been love but it's over now
From the moment we touched 'til the time had run out
Make-believing we're together
That I'm sheltered by your heart
But in and outside I've turned to water
Like a teardrop in your palm
And it's a hard winter's day, I dream away
It must have been love but it's over now
It must have been good but I lost it somehow
It must have been love but it's over now
From the moment we touched 'til the time had run out
It must have been love but it's over now
It was all that I wanted, now I'm living without
It must have been love but it's over now
It's where the water flows, it's where the wind blows