Gryffindor, Slytherin, Ravenclaw, Hufflepuff

Katy Perry:

Dressin' Up
Part of Me
Wide Awake
The One That Got Away
Teenage Dream
Firework
E.T.
One of the Boys
I Kissed a Girl
Waking Up in Vegas
Hot 'n' Cold

Rihanna:

Where Have 你 Been
We Found Love
Talk That Talk
Birthday Cake
Don't Stop the Music
Umbrella
Disturbia

Ellie Goulding:

Lights
Starry Eyed

The Wanted:

Glad 你 Came
All Time Low
Chasing the Sun
Lighting

Shealeigh:

Strangely Beautiful
What Can I Say
Spotlight
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These are the ones I can think of. I highly recommend these songs to you. So look them up on YouTube if 你 want to listen to them.