LOL Avril's career as a major pop artist are over. She'll never make a comeback unless she does something unusual such as become a judge on The Voice or something strange like that. She needs a boost from something to catapult her back into the limelight ala Gwen Stefani. Gwen was a huge radio, and singles artist, and look how difficult she is finding it to come back even after The Voice appearance. Used to Love You is the best type of success we can hope for by Avril at this stage.
How do you explain Mariah's comeback with TEOM and Britney's comeback with Circus then?