Watch Kacey Musgraves and Harry Styles Cover Shania Twain at Madison Square Garden

For the last two nights, Harry Styles took over the famed Manhattan arena Madison Square Garden. More importantly, he brought along a very good choice as an opening act -- none other than Kacey Musgraves, who's currently touring behind her great new collection Golden Hour, one of the best albums of the year so far. Fans who arrived…