As an old fan, the moment that I started feeling things were going wrong was 'Hold It Against Me'. 'BO' is her best piece of work to date, 'Circus' was meh except for 5 tracks, but it was a good comeback and none of us expected her to return with a masterpiece straight out the gate, so I was fine with it. With the whole 'FF' era however, we all expected a TRUE return to form with good dancing, epic videos, amazing pop music and worldwide domination. And we got so much hype from producers and choreographers that we really thought it was coming. And then we got a solid pop song that couldn't however rival the quality of her pop classics, no promotion and the most disappointing and late video of all time. The subsequent album and single releases were messy as well.

The downward spiral continued with 'BJ'. We kind of got a little bit of hope that the comeback 'FF' should have been was finally happening and then, although she delivered an amazing video and a good enough choreo, her music was so bad that these things didn't even matter anymore

Notning. Sure FF underperformed but single wise it was probably one of if not THE biggest radio era for Britney.

The only reason why she's "flopping" is bc BJ is useless. It was used to add fresher material for the Vegas shows. Tbh it was too much for her and her team to focus on. A Vegas show has to be a monster to plan and execute.