Well that is more entertaining than all the rest of her show for sure. She should stop trying to be a parody of herself with her half-assed zumba choreos and armographies with lip syncing and 0 stage presence. THIS is what i want to see from her. She's alone and owning the stage, feeling the music, connects with the audience and simply killed everything. This is Britney. And this is what an artist is supposed to do and what she MUST continue to do.
But it probably won't happen again which is sad. I really don't understand why she doesn't sing, minus hairflips and 15 seconds of zumba choreo, here she walked and posed and does that 70% of the time in every performances and she just showed us that she still can sing (without a backing track on top of that) while walking and posing, so why not do it all the time? I really but really don't understand and it really kills me knowing she's capable of doing it but won't do it. If she may feel uncomfortable singing her own songs live then make a whole show covering songs from other artists i don't care but that kind of performance is what she should be doing all the time, period.