This is just a quick follow-up on my earlier wizard rock post. Seemed unfair to spotlight the Remus Lupins only, so I after a quick search on YouTube, I found this clip from the actual concert. It's the Whomping Willows playing a song about how Harry and Draco secretly want to make out.
If you are eagle-eyed, you might spy Emily sitting on the floor along the back wall with the other munchkins. She's sitting at the feet of the woman holding the baby.