Faith Hill and Tim McGraw have incredibly strong genes - with more than one of their daughters following in their footsteps as musicians.MORE: Faith Hill and Tim McGraw's daughter Gracie has the most amazing NYC apartmentThe couple's youngest daughter Audrey McGraw blew her social media followers away this week after sharing an incredible video of herself singing at the piano.Modestly describing the footage as "very messy" and "very rough," Audrey had many people disagreeing with her.