New unknown music!?1?

Okay. I wanna get new stuff on my ipod. I like pop britney spears, madonna, gwen stefani. I also love Avril Lavigne. I want some artists and songs that aren't really known. I already have all the radio songs. Maybe a pop emo band. I like a lot of different stuff. and if u can find cool spanish music id be grateful. I love belanova! (spanish stuff can be popular pop.)