Reba McEntire wants to do her mother proud. Sitting down with ET Canada's Morgan Hoffman for the new special "One-on-One with Reba McEntire", the country singer talks about almost quitting music after her mother died. [readmore label="READ MORE: " link="https://etcanada.com/news/993129/reba-mcentire-reveals-who-causes-the-most-trouble-on-the-voice-set/" text="Reba McEntire Reveals Who Causes The Most Trouble On ‘The Voice’ Set"] Asked how long…