I’m A Believer Neil Diamond, The Monkees (#1 in 1966), Smashmouth (#4 in 2001), Used in the movie Shrek

I thought love was only true in fairy tales
Meant for someone else but not for me.
Love was out to get me
That's the was it seemed.
Disappointment haunted all my dreams.
    Then I saw her face, now I'm a believer
    Not a trace of doubt in my mind.
    I'm in love, I'm a believer!
    I couldn't leave her if I tried.

I thought love was more or less a given thing,
Seems the more I gave the less I got.
What's the use in tryin'?
All you get is pain.
When I needed sunshine I got rain.