These two girls had HUGE debuts but after 5 or so years their popular waned significantly, but who will end up having the most longevity in the industry?
Avril's stats so far:
Let Go: 16m
Under My Skin: 10m
The Best Damn Thing: 6m
Goodbye Lullaby: 1.5m
Avril Lavigne: 600k
Gaga's stats so far:
The Fame + The Fame Monster EP: 15m
Born This Way: 6m
Artpop: 1.65m
If we compare Avril at the same point in Gaga's career, she was coming off the Best Damn Thing era (5-6 years into her career) which produced a #1 global hit and sold 6 million copies. However Avril fell off quite a bit after that, while Gaga had two HUGE eras and has fallen off a bit now, but could still continue to be a force in the future.
Who will have more longevity overall?