Edit - nevermind this post, I've made it to remind my future self I've found this someday...
Both their songs have the same few sounds at the beginning
Avril - I'm with you https://www.youtube.com/watch?v=dGR65RWwzg8
Camila - Crying in the club
https://www.youtube.com/watch?v=NlrYn_dZdqk
Listen to the only first couple of seconds, I'm curious if you could hear it or it's just me :)