Of course the other girls knew. They're trying to spin this in the best way they can.
They've left her out of their little foursome for years now, in part because Camila dared to make high-profile connections. Back when Camila being friends with Taylor was new, you could see the envy and ANGER all over every single one of their faces. Everything has been visibly awkward between her and the other four since around that time. They were jealous of her single with Shawn Mendes even though they all had intended, and were preparing, to venture into solo opportunities themselves. This almost certainly even goes as far back as when Demi singled out Camila as the only one with "it" on XF USA.
What's funny is that Camila, although unhappy, continued to work HARDER (concerning 5H activities) than each and every one of the other girls. All you have to do is watch their live performances... the other girls always turn out messy, disinterested, serving barely-there vocals, etc... Camila always did more.
Now these girls wanna play with this nonsense about being blindsided. They've wanted her out of the group for some time. This is exactly what they wanted and now they've got the nerve to pretend they're the wounded party.
And don't get me started on their stans. Y'all have mistreated and shamed Camila for SO LONG now and y'all are up in here salty af continuing this nonsense, shading her and claiming this is exactly what the group needed. Please. You wouldn't be here at all if you weren't insecure about the fact that the group is losing its STAR.
You say the group is better off without her, and she's always been the odd one out, then should y'all be happy she's finally left and you have the other 4? 
) tweeted that before Camila was able to announce it herself.. that's what I'm guessing she meant by without her knowledge. I'm sure anyone would like to announce it before others do it officially.
