'America's Got Talent' judges criticized some acts while praising others on August 23.

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 The ensemble had technical difficulties before their performance, and it was uncertain if everything would go smoothly.

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 Third AGT live shows begins

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He thinks they were off-key at times but thought the finish of the performance was excellent. Howie calls Bri "the star." 

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The Cline Twins' hockey act is top-notch. This time, they integrate movement and go close to the judges. 

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 Amanda Mammana excels with another unique tune. Simon: "What a change from the bashful person we met."

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 Simon says the kids know their audience. He dislikes the tune but loves their energy. 

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 Sara James' Elton John version is amazing

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Simon compliments Celia's "unique" ventriloquism style. She's "the best act so far," he says.

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 Simon says, "I'm emotional for you." Her song choice impresses him. Howie calls it a "win." Sara is unbeatable.

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