After returning to Earth, Katy Perry brought all of the hits (and none of the haters) to the American Airlines Center.

Fans ruthlessly roasted Katy Perry for her robotic and "awkward" choreography ... robot-inspired moves to her hit "Part of Me," all while rocking a space-age cone bra and thigh-high boots.

Katy Perry stopped a recent concert to confront a fan for messaging her husband Orlando Bloom on social media.