The era of the pop girls being the soundtrack the world is over
Britney is gone, Beyonce is gone (hasn't had a hit in most of the world since 2009), Avril is gone, Nelly F is gone, Gwen is gone, my girl Shakira is on life support but at least she has her Latin markets, the rest will be gone soon too.
Only Katy and Miley will survive the next few years as rock, hip-hop, soul and RnB dominate.