I watched core memories being made at the sold-out "Descendants/Zombies: Worlds Collide" concert at Madison Square Garden. (Photo illustration: Yahoo News; photos: Suzy Byrne/Yahoo News)MANHATTAN - The night belongs to the kids. Tiny girls, dressed in red, at their first concert. Tweens, in tutus and Seabrook High jerseys, a nod to the fictional school that Addison, Zed and the gang attended in the movies, singing along. Teens, in "I ❤️Malachi" T-shirts and sequinned shorts, shrieking from the depths of their souls.