Break The Rules 'cuz U R The Best

ΘΣ

You're so good

Baby there ain't nobody better 

(Ain't nobody better)

So you should

Never, ever go by The Letter 

ΑΩ

You're so cool 

(Cool)

Everything you do is success

Make The Rules 

(Rules!)

Then break them all 'cause U R The Best

Ianto Jones...?

Ianto: 

[Deep Breath] - "Life Knife".