"Happy"是由Leona Lewis在2007年贏得X Factor比賽後發行的歌曲，所以詞曲都由她一手包辦。以下為這首歌的歌詞：
Verse 1:
Come and wake me up when I wake up
Waking up in the morning, feeling happy
Out of all the stars in the sky, yeah
Only one star's in my sky
Chorus:
I'm so happy
Come and dance with me now
Just make me happy
Don't let me down now
'Cause I'm so happy
With you, with you
Verse 2:
In my life, I've been looking for something
I don't need anything else
All I want is you, and you only
That's all I need to make me happy
Chorus:
I'm so happy
Come and dance with me now
Just make me happy
Don't let me down now
'Cause I'm so happy
With you, with you
Bridge:
There's a time for everything in life
So why not close your eyes and dream
Now that I've found what I'm looking for
I'm so happy, yeah, yeah, yeah, yeah
Chorus:
I'm so happy
Come and dance with me now
Just make me happy
Don't let me down now
'Cause I'm so happy
With you, with you (x2)
Outro:
Come and dance with me now (x2)
Yeah, yeah, yeah, yeah, yeah, yeah, yeah (x2)
I'm so happy (x2)
Yeah, yeah (x2)
You make me happy (x2)
You make me feel alive (x2)