I need some song suggestions...

Britt Nicole, Karmin, Colbie Colliat...those are three good ones.

Slow & Relaxing: I would recommend RyanDan (twin artists), their música is usually slow and really nice, particularly the song 'Tears of An Angel'. I would also recommend the band Red, not all their songs are slow and relaxing, but one that is and that I amor is 'Hymn of the Missing', fab song! Also, the band Civil Twilight has some really nice songs. There's also the band Evanescence, and their songs are pretty amazing as well <3 Also James Arthur is amazing, and I'm sure you'd amor his music, especially the song 'Recovery'. There's also Skylar Grey, her voice is pretty good and she sings R&B.

the raposa song

the toxic airborne event is kind of like the killers? also walk the moon... and the family rain, they're not that noticed but my college got a hold of them to talk to my class before their apresentação, show, gig and they're really cool people!

for paramore related musicians i would say orianthi, shes a kick bunda female guitarist and she was going to be michael jackson's guitarist for 'this is it' before he died. she has some pop punk tracks of her own though and they remind me of paramore :)

Emma Hewitt is good for that (least in my opinion)

L.A.O.S' Hush Now (But you'd have to find the non-dubstep version).

Within Temptation's Utopita -- I really like that one

Some other bands I personally amor are Omega Lithium and Delain but those aren't very slow or Relaxing. Also Within Temptation is the shiz.

MS MR, IAMX, Lorde, Lana Del Rey