Katy Perry's fans are slamming her for having 'midlife crisis' as she parties in London in new Instagram video.

Katy Perry and opener Rebecca Black took the stage to a sold-out crowd at Anaheim’s Honda Center on Sunday, July 13.

But Perry’s longevity and the scale of her fame since her 2008 breakout hit, “I Kissed a Girl,” are attributable at least in part to her willingness to get back up in the wake of a setback ...