Britney wouldn't sacrifice herself, what are y'all talking about? She has kids she needs to survive for.
Any pop girl with children most likely won't sacrifice themselves.
If anyone were to sacrifice themselves it would be Gaga and she'd only do it because of some weird, artsy, symbolic reason.
Beyonce would probably stand aside and not get involved and just think "it obviously can't be me"
Madonna would try to act like the leader and just end up being hated.
Rihanna would be a bad bitch and just say why certain people wouldn't really matter if they were gone.
Nicki's insecurity would probably make her feel like she's not worthy of being sacrificed. She'd probably hang tight to Bey, Madonna and Rih for protection.
Taylor would be deceptive and tell everyone what a hero they would be if they did it till someone agreed with her.
Lana would probably betray them by hooking up with the daddy kidnappers
Gaga would want to do it in the name of Art.
Mariah wouldn't even bother and just throw shade while hanging out with Beyonce by the side and saying how the others should hurry up in deciding so she could make it before the kids bedtime.
Katy would most likely be sacrificed after everyone has decided it wouldn't be that big of a loss if she was gone and that she has nothing she stands for really.