I saw the show in Manchester on Saturday night and was close to the stage. I loved the show and Britney was definitely killing it with her dance moves, but something seemed off with her. I too can't understand why she puts her hair in the ponytail, because it clearly causes her some anxiety, because she must have tightened it about 30 times throughout the show.
I also am slightly concerned that she doesn't always seem to know what city she is playing in. I clearly saw her ask one of the dancers where they were, and by the sound of it, she seems to do this every night of the tour so far. I understand that touring can become like ''groundhog day'', however she should know where in the world she is. It's not like she turns up at the venue five minutes before showtime, she usually arrives at around 4.30pm to do soundcheck, make up, food and meet and greets with fans.
I just hope that everything is ok with her and that her team around her are looking after her.