America to name its next million-dollar act this week on 'America's Got Talent'

The remaining six acts head to the finals to compete for the $1 million prize and a headlining show in Las Vegas; grand finale show to feature an all-star lineup of guest performances, including Justin Bieber, Green Day, NE-YO, Blue Man Group

After months of searching for America's next superstar act, NBC's top-rated show "America's Got Talent" heads into its final week, with the final live contestant performance show on Wednesday, Sept. 12 (9 p.m.), and a two-hour star-studded finale featuring a dynamic lineup of guest performances on Thursday, Sept. 13 (8 to 10 p.m.) The final remaining six contestants selected from thousands of hopefuls will bring out all the stops one last time, as they compete in front of judges Howard Stern, Howie Mandel, Sharon Osbourne and host Nick Cannon for their final chance at the $1 million prize and a headlining show in Las Vegas.

After a season that has seen an unprecedented and diverse amount of talent - from waterskiing squirrels to stand-out surprises, including contortionist dancer Turf and opera singer Andrew de Leon - the final six acts that will compete on Wednesday are: Sand story artist Joe Castillo from Lexington, Ky.; comedian Tom Cotter from New York City; Earth harp inventor William Close from Los Angeles; artist David Garibaldi and his CMYK's from Sacramento; dancing group The Untouchables from Miami; and traveling dog act Olate Dogs.

Find out more about the acts:

•Joe Castill

• www.facebook.com/JoeCastilloAGT
  
• @joescastillo

•Tom Cotter

• www.facebook.com/TomCotterAGT
  
• @TomCotterComic

•William Close

• www.facebook.com/WilliamCloseAGT
  
• @earthharp22

•Olate Dogs

• www.facebook.com/OlateDogsAGT
  
• @olatedogs

•David Garibaldi

• www.facebook.com/DavidGaribaldiandhisCMKYsAGT
  
• @garibaldiarts

•The Untouchables

• www.facebook.com/TheUntouchablesAGT
  
• @UnTouchablesAGT

An amazing lineup of appearances will also grace the "America's Got Talent" stage on Sept. 13, including a ground-breaking theatrical performance by Blue Man Group and musical performances by Justin Bieber, NE-YO and Green Day.

On the heels of his hit singles "Boyfriend" and "As Long As You Love Me" feat. Big Sean from his latest album "Believe," global superstar Bieber makes his next stop on the "America's Got Talent" stage for the show's grand finale. His latest studio effort is his fourth No. 1 album debut and the highest debut album of the year, with four hit singles in "Boyfriend," "All Around the World" featuring Ludacris, "Die In Your Arms," and second single "As Long As You Love Me" featuring Big Sean.

Multi-platinum, three-time Grammy Award-winning artist NE-YO joins the "AGT" stage to perform his hit single "Let Me Love You (Until You Learn To Love Yourself)," from his upcoming album, "R.E.D.," arriving in stores in November. "R.E.D." is NE-YO's first album for Motown after seven hugely successful years and four RIAA gold and platinum albums as a core member of IDJ since 2005.

Green Day joins the "AGT" stage to perform their new single, "Oh Love," off the first of their trilogy of new albums - "Green Day ¡Uno!," "Green Day ¡Dos!" and "Green Day ¡Tré!" After taking the music scene by storm in 1994 with the arrival of their album "Dookie," Green Day has continued to top the charts with the subsequent studio albums "Insomniac," "Nimrod" and "Warning," while entertaining millions of fans with their frenetic live shows. Their landmark 2004 album "American Idiot" launched Green Day into the stratosphere, debuting at No. 1 on the Billboard chart and leading to five hit singles, before earning seven Grammy nominations (winning two, including Best Rock Album). Their album "21st Century Breakdown" won a 2010 Grammy for Best Rock Album and spawned two hit singles: the gold "Know Your Enemy," and the double-platinum "21 Guns," which earned them three 2009 MTV Video Music Awards, including Best Rock Video.

On Wednesday, Oct. 10, Blue Man Group will unveil its newest production complete with electrifying music, sensational technology, a captivating nightly procession and its signature interactive, audience experiences at the Monte Carlo Resort and Casino in Las Vegas. The mega-enhanced show presents a thrilling, energy-infused combination of the signature pieces Blue Man Group is known for, while introducing new playful personalities and dynamic new instruments. Founded by Chris Wink, Phil Stanton and Matt Goldman, Blue Man Group is now in its third smash decade and have transitioned from cult figures to international icons, recognized the world over as symbols of creativity, mischief and bold, boundless theatricality. The multinational media and entertainment company boasts theatrical and digital media operations across three continents, permanent live performance installations in six cities, an ongoing theatrical tour of the US and Canada, as well as a highly acclaimed show on Norwegian Cruise Line's "Epic."

"America's Got Talent" is the No. 1 summer series on basic cable in adults 18-49 and total viewers (marking the seventh straight year the show has ranked as the No. 1 summer series in that category).

"America's Got Talent" was created by Simon Cowell's SYCO Television and is co-produced by Syco TV and FremantleMedia North America.

Find "America's Got Talent" at www.nbc.com/americasgottalent/.
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