fgjf;; LET'S BE REAL
From the START Ke$ha and Avril Lavigne were destined to reach where they currently are.
They are the equivalent of White Ciara's. Got popular because their music fit a current trend (mid 00's Pop-Rock, and early 10's Dance Pop) and once the trend got over, they themselves, got over.
The truth is they'll probably never be coming back big.