Shania Twain is celebrating Dolly Parton's birthday with an iconic throwback video. The "That Don’t Impress Me Much" singer, 60, took to Instagram on the country legend's 80th birthday with a 2003 ...

You've heard these songs a thousand times, but did you know Dolly Parton wrote every single one of them?

Add Yahoo as a preferred source to see more of our stories on Google. Twain introduced the singer by referring to the day as "a life long dream of mine" and that Parton was her "musical and personal ...