So i really need to know what this song is called?

i feel kinda dumb for asking but i liked the song and i want to download it but dont know what its called. its a country song and its sung by a girl and the only part i remember is her talking about taking out her rearvew mirror while driving away because shes never looking back. its about a guy who obviously hurt their relationship and screwed up and shes singing about how shes leavin and never lookin back. Help??? i'll check any suggestions and really appreciate your time and help...