All except Beyonce's. But is Beyonce really going to release? There's been rumors and speculations about the other three, with Rihanna's being practically confirmed.
R8
LG5 - mainly because this will be her 'make' or 'break' album.
BEY6 - (im guessing this is her joint album with Jay that's coming this year?) will be bound to create lots of hype.
B9 - Britney Jean was of the worst albums I've ever listened to, I won't be interested/listening to her next effort.