NBC's "America's Got Talent" continued the opening week of its seventh season Tuesday with hopefuls at a San Francisco audition performing for judges Howard Stern, Sharon Osbourne and Howie Mandel. Nick Cannon was on hand to emcee the evening. The mix of singers, dancers, magicians and other acts are all competing for a $1 million grand prize.

Here's a summary of the most entertaining acts of the evening:

Cristin Sandu is a 17-year-old balancing act who comes from a long line of circus performers. Shirtless, he stood on a plank atop a series of pipes, much to the astonishment of the judges and the crowd. He advanced to the Las Vegas rounds.

LCD - The Lisa Clarke Dancers range in age from 14-17, and perform a routine that combines different forms of dance, including ballet, jazz and modern. They advanced.

The fist comedian of the season was David Burleigh, an impressionist who did impressions of Nicolas Cage, Bruce Willis, Jack Black, Charlie Sheen and a conversation between Owen Wilson and Vince Vaughn. The judges advised Burleigh to improve his material, and said they looked forward to seeing him again in Vegas.

Opera singer Luis Meneghan brought the audience to tears. By day, the 54-year-old is a nurse who sings to his elderly patients.  He performed a moving rendition of "Nessun Dorma" from Puccini's "Turandot", and advanced.

Granny G is an 80-year-old rapper. She came on stage using a walker and proceeded to bust rhymes about teen sex and family values. She was so full of life and energy, she was put through to the Las Vegas rounds in what the judges called a "million-to-one-shot."

Tim Hockenberry is a 49-year-old singer, pianist and father of four who wowed the judges with his heartfelt version of "You Are So Beautiful," in the style of Joe Cocker. Howie Mandel called him a "phenomenal talent."  He will sing again in Las Vegas.

"Turf" is an extreme contortionist who usually dances on the streets. He slow-walked, air-danced and twisted his body into seemingly impossible positions to win three thumbs-up from the judges. Turf became very emotional and told kids watching the show to follow their dreams.

Other acts advancing included a graffiti artist/dance troupe that threw paint on a canvas in time to Beethoven's "Fifth Symphony" to eventually reveal an amazing portrait of the composer; a magic act in which a man proceeded to play the piano after being "cut in half"; a cool juggler; and a guy dressed as a janitor who played his broom like a flute.

Among those failing to move on were Mr. Special, who dressed as a giant angry bird and rode a small bicycle while playing the trumpet; a group that played suitcases they turned into musical instruments; a motorbike-riding acrobatic act; and a dog on a pony.

NBC's "America's Got Talent" airs again next Monday at 8:00 p.m. Eastern time.