Mercedes:
There's a boy I know
He's the one I dream of, oooh
Looks into my eyes
Takes me to the clouds above, mhmmm

Ooh, I lose control (Santana: Ooh)
Can't seem to (with Santana: get enough ooh)
When I wake from dreaming (Santana and Kurt: Ooh)
Tell me is it (with Santana and Kurt: really love aha)

Mercedes, Kurt and Santana harmonizing

Rachel:
How will I know? (Mercedes, Kurt and Santana: Don't [bad word] your feelings)
How will I know? (Mercedes, Kurt and Santana: Know)
How will I know? (Mercedes, Kurt and Santana: Love can be deceiving)
How will I know? (Mercedes, Kurt and Santana: Know)

All:
How will I know

Santana and Mercedes:
If he really loves me

All:
I say a prayer

Santana and Mercedes:
With every

All:
Heart beat, I fall in love

Santana and Mercedes:
Whenever we meet

All:
I'm asking you

Santana and Mercedes:
Cause you know about these things

All:
How will I know 

Santana and Mercedes:
If he's thinking of me

I try to phone but I'm too shy
(Rachel and Kurt: Can't speak)
Falling in love is all bitter sweet

All:
This love is strong

Santana and Mercedes:
Why do I feel weak

All:
Oh, wake me, 

Mercedes:
I'm shaking (Santana: Ooh)
Wish I had you (with Santana: near me now aha)

All:
Said there's no 

Mercedes
Mistaking (Santana, Rachel and Kurt: Oooh)
What I feel is (with Santana, Rachel and Kurt: really love aha)
Oh tell me

Rachel and Kurt:
If he loves me

Mercedes and Santana:
If he loves me

Rachel and Kurt:
If he loves me

All:
If he loves me not (Mercedes: Ooh yeah)

Rachel and Kurt:
If he loves me

Mercedes and Santana:
If he loves me

Rachel and Kurt:
If he loves me

All:
If he loves me not (Rachel: Oh)

Rachel:
How will I know 

Kurt, Mercedes and Santana: 
How will I know 
If he's thinking of me

All:
I try to phone 

Santana and Mercedes:
but I'm too shy (Rachel and Kurt: Can't speak)

All:
Falling in love 

Santana and Mercedes:
is all bitter sweet

All:
This love is strong 

Santana and Mercedes:
why do I feel weak

Mercedes: 
How will I know

Kurt, Rachel and Santana:
How will I know 
If he really loves me (Mercedes: How will I know?)
I say a prayer (Mercedes: Hey, how will I know?)
With every heart beat, (Mercedes: How will I know?)
I fall in love (Mercedes: Ooh, how will I know?)
Whenever we meet (Mercedes: How will I know?)
I'm asking you (Mercedes: Yeah, how will I know?)
Cause you know about these things (Mercedes: How will I know)
How will I know?