Lyric discussion by Lovely97 

Cover art for Liar Liar lyrics by Christina Grimmie

This song says it all for me... The girl cares so much about this guy, and he goes and lets her down. She has a hard time dealing with it because she loved him so much, but she finds a way to be strong. Just as she is starting to heal, the guy tries to come back to her. She says "liar liar, dont cry on my shoulder", meaning he didn't pull through like he said he would and he hurt her, and now she isn't going to let him back into her heart just because he wants to come back. She thought he was different ("thought you were someone"), but he was just another dumb boy ("you played with fire, and smiled when you told her")

My Interpretation