Simon Curtis - Let's Go Feel The Music 

Yes, The Woman singing this song with Simon Curtis is Hailee Steinfeld

I'm not sure, but it's himself. Same with super psycho love :P (English is not my first language, maybe I have some mistakes.)

I figure it out it's Hailee Steinfeld

I have found my family :3

Yes. Did yaoi bring you?

Misaki Yata, it depends on how you look at it. Yaoi brought me to Simon Curtis, but not this song specifically. :p

Me too... the song was either Don't Dance... or Flesh... i think.... xD

Misaki Yata, haha, I first heard either "Super Psycho Love" or "Flesh" from a yaoi mv, and I had no idea that they were by the same artist, but I loved both songs. Then I listened to a mashup of Britney Spears' "If U Seek Amy" and his song "Diablo," and I absolutely fell in love with it!