You were trying to sleep, you were the Gryffindor Princess in the Gryffindor Boys, why are you the Gryffindor Princess? Because you were so kind, caring, nice, pretty, funny, ect. And you Wear dresses.
And you were really trying to sleep but you heard the Gryffindor boys being stupid and singing in the common room.
So you decided to go down the stairs and you Saw Harry, Fred, George, Oliver, Percy, Ron and Neville singing "Call Me Maybe" but they were drunk, they were all drunk so they were singing loudly with the song in the background.
You were still by the stairs, in the second one from down and you were in your pyjamas clad and your mouth agape because of the drunk boys in front of you, you never saw Oliver and Percy drunk like that, the Gryffindor Quidditch Captain and Gryffindor Prefect..
And that's how they greet the Gryffindor Princess, so polite..