The Shania Twain catalog is rich with radio hits, songs that have come to define an era in country music and paved the way for other genre-bending artists that followed. But there are also some deeper cuts that stand among Twain's best. While they may not have the pop-culture appeal of monsters like "Man! I Feel Like a Woman!" or "That Don't Impress Me Much," they are integral to the Canadian superstar's fabric. As Twain releases her new album Now this month – her first in 15 years – we rank her 20 best tracks in order.