Brad Pitt recently addressed Shania Twain flopping out his name with Ryan Reynolds' name on her classic track 'Don't Impress Me Much.' Twain made the switch during her performance at the People's Choice Awards in December. Brad said about Ryan Reynolds, "He didn’t steal it. I think we can share the wealth. Ryan’s a good egg. He deserves some love." After the performance, Ryan reacted to Shania and said, "I can’t think of a more iconic, smart, and beautiful person to not impress all that much." Where would you rank Shania Twain on the list of best country music singers of all time and why?