You were trying to sleep, you were the Slytherin Princess on the Slytherin Boys and you were the only girl and you were really trying to sleep but you heard the Slytherin boys being stupid and singing in the common room.

So you decided to go down the stairs and you saw Draco Lucius Malfoy, Tom Riddle, Adrian Pucey, Lucian Bole and Blaise Zabini 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..

So that's how they greet the Slytherin Princess, so polite, isn't it.