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'America's Got Talent': 5 Acts Advance

A guitarist from Baltimore, three singing sisters from Seattle, a percussive quartet from New Hampshire, a soprano singer from Houston and a pint-sized dance duo from Everett, Wash., have claimed the last five semifinal spots on "America's Got Talent."

Seven more acts were dismissed from the NBC talent show Wednesday as the semifinal slate of 20 acts was sealed. Viewers selected the top four favorites via phone, e-mail and text message votes, while judges Piers Morgan, Sharon Osbourne and David Hasselhoff picked the fifth semifinalist.

The contestants are vying for a $1 million prize and the chance to headline a Las Vegas show in October.