Fifteen minutes before the show started, a mere mention of their name caused turned the crowd up to 11. The trailer for their upcoming Morgan Spurlock-directed documentary, This Is Us (out August 30), played on the two screens surrounding the main stage. Everyone screamed and screamed and screamed. Oh yeah, and then they screamed some more.

Raising their pitch ever so slightly when their favorite member popped onscreen � something the mostly female crowd did throughout the night. Harry Styles seems to get the loudest endorsement, but funny guy Niall Horan is a very close second.

The constant screaming made it more than a little hard to hear the guys sing, which for the most part they do very well. But let's be honest, a lot of these ladies and a few gentleman don't really care if they hear them sing. They've heard these songs a million times. They just want to get a chance to see the guys in the flesh. Even in the upper level, little girls started to sob when one of the guys waved in their general direction.

And the fivesome get it. A 1D concert is less about the music and more about the experience. Their show is a variety hour filled not only with their hits like "Live While We're Young," "Kiss You" and "What Makes You Beautiful," but also video skits of the guys having fun in their London digs.