Illegal love potion

Yesterday I wore my shortest skirt to Slughorn's class
He's easy to manipulate and so I made my pass
And just as I had hoped, he simply signed his name for me
Allowing me into the restricted part of the library

Madam Pince was doubtful, but she had to let us look
We searched for half an hour through the dusty smelly books
And finally we found it in a book called Forced Devotions:
A complicated spell for an illegal love potion

Romilda Vane was silly
That stuff is child's play
Chocolate cauldrons, don't waste my time
We're gonna do this the dark wizards' way
The ingredients will be tricky
But a Parselmouth has her way
Harry Potter, be afraid
'Cause you will be ours
Someday
Someday
Someday

Illegal love potion
You'll never know what hit ya
Illegal love potion
We're not afraid to break the law
Illegal love potion
You'll never know what hit ya
Illegal love potion
We're not afraid to break the law

Romilda Vane was silly
That stuff is child's' play
Chocolate cauldrons don't waste my time
We're gonna do this the dark wizards' way
The ingredients will be tricky
But a Parselmouth has her way
Harry Potter, be afraid
'Cause you will be ours
Someday
Someday
Someday