From the New Kids on the Block collaboration with New Edition to Jennifer Lopez in a Wedding dress, ET has everything from the “American Music Awards.” Then, why Britney Spears’ calling out Christina Aguilera. Plus, Jennifer Lawrence’s baby bump makes its red carpet debut. And, only ET is in the ballroom spilling secrets from “Dancing with the Stars” final rehearsals. Plus, a wedding update from “Dancing” pro Artem and fiancé Nikki Bella. And, our exclusive with the Bella Twins.

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