In the beginning of the movie she turns on music in her car I want to know what the name of that song

I think it could be 'Weeds and Wildflowers' and was sung by Jana Kramer. There have been loads of people trying to find this song and this is the publishers response:-
"Razor & Tie Music Publishing Weeds and Wildflowers was performed by Jana Kramer and was written by our writers Catt Gravitt and Gerald O'Brien along with Tania Hancheroff. As far as we know, it is not yet available for purchase."

Hope it becomes available soon :)