The performers - who were already eliminated once during earlier stages of the show - booked their place in the next round on tonight's live results episode of the NBC competition.
Sharon Osbourne was "delighted" over West Springfield Dance Team's success, as they were one of her wildcard picks and she believes that there is an audience that will love the horror theme of their dance. "America has spoken!" she added.
The Kinetic King's advancement also pleased Piers Morgan, who came up on stage to kneel and shake his hand in congratulations.
Howie Mandel had nothing but praise for Landon Swank, saying that he deserved to be there. He also wished him the best in the semi-finals.
Their success means that Shevonne, Yellow Design Stunt Team, Charles Peachock, Funny Little People, Avery and the Calico Hearts, Seth Grabel, J Chris Newberg and The Fiddleheads were eliminated for a second time and sent home empty-handed.
The 12 acts who were unsuccessful during past stages of this year's competition performed for the judges and voting public last night as they competed for a $1 million (£619,069) prize and the chance to headline a show in Las Vegas.
Snap Boogie, Sandou Trio Russian Bar, Anna Graceman, Miami All-Stars, Silhouettes, Steven Retchless, Daniel Joseph Baker, Smage Bros. Riding Team, Poplyfe, Landau Eugene Murphy Jr, Lys Agnes, Professor Splash, Fatally Unique, Zuma Zuma, Team iLuminate, Melissa Villasenor, Gymkana, Matt Wilhelm, Kevin Colis and Beth Ann Robinson have already gone forward to the semi-finals.
Tonight's instalment featured a performance from singer Colbie Caillat of her single 'Brighter Than The Sun'.
The cast of Les Miserables also took to the stage with a selection from the Broadway show of 'One Day More'.
America's Got Talent continues next Tuesday at 9/8c on NBC.
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