Neither Beyoncé or Gaga are in their “flop era.” It’s just clear from the sales (particularly Cowboy Carter compared to Renaissance sales) that people have hit a wave of concert fatigue.

Beyoncé’s 10th concert tour kicked off last night — and the “Texas Hold ‘Em” singer, 43, did not disappoint. The international superstar’s oldest daughter, Blue Ivy, 13, performed as ...