Cho broke up with Harry when they were in fifth year. Harry found out that Cho wanted another guy, but he wanted to come back with Harry.

"Cho, you broke my heart, know you want me back?" Harry asked her while she was drowning in tears. Harry stood in the middle of the room, and started dancing and singing like Justin Timberlake.

::Harry::

You were my sun

You were my earth

But you didn't know all the ways I loved you, no

So you took a chance,

And made other plans.

But I bet you didn't think your thing would come crashing down, no

You don't have to say, what you did

I already know, I found out from him

Now there's just no chance

For you and me, there'll never be

And don't it make you sad about it

You told me you loved me

Why did you leave me, all alone?

Now you tell me you need me

When you write, by your owl

Girl I refuse, you must have me confused

With some other guy

Your bridges were burned, and now it's your turn

To cry, cry me a river

::Ron::

Cry me a river...

Cry me a river

Cry me a river, yeah yeah

::Harry::

I know that they say

That somethings are better left unsaid

It wasn't like you only talked to him and you know it

Don't act like you don't know it

::Ron::

All of these things wizards told me

Keep messing with my head

You should've picked honesty

Then you may not have blown it yeah

::Harry::

Cry me a river

Cry me a river, oh

Cry me a river, oh

Cry me a river, oh ::Ron::

Cry me a river, oh Cry me, cry me

Cry me a river, oh Cry me, cry me

Cry me a river Cry me, cry me