Sat "next" to Anastacia, JFK-FRA two years ago. We were both in C, she sat the row in front of me.
She was quiet and peaceful, and not willing to engange in any conversation: "do you mind, I am trying to relax"...
Of course with my sister shouting "that's Anastacia!!!" upon boarding I didn't really stand much of a chance.
Kind regards,
Maurits