Madonna is the only pop gal that can throw a punch. Taylor is built like a breadstick, Gaga would just slap silly, Beyoncé didn't stop her sister from beating up her husband so she is obviously afraid to fight, you would need the correct computer code to program Britney with a punch action, Rihanna acts like a bad gal but I bet she scares easily, and Katy would maybe land a hit but only if the opponent let her.