Regardless of whether Gemma won immunity, she wouldn't be evicted in a vote to save. She got top three tonight... so really... she wouldn't have been evicted anyway...

Exactly.

She's immune. Surprise surprise - not!

she will win the show ain't she like queen of twitter? with army of 70 billion followers

You cannot possibly know that - her popularity has been waning for a couple of days and would probably continue so could easily have resulted in her being voted out next.

Will she get to choose who is up for eviction?

Well yeah, standard. But it's not really the immunity imo, it's more the power that goes with it. I think that's what's irritating most folks.

I stopped getting upset over BB decisions ages ago.