TV ratings: 'America's Got Talent' slips but wins Tuesday night

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Zac Barnett of American Authors is seen on set for a video shoot on Oct. 26, 2014, in Dickson, Tenn. (Rick Diamond / Getty Images)

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Extras acting in the HBO series “Game of Thrones” leave the bullring on Oct. 22, 2014, as film crews began shooting part of the fifth season in the southern Spanish city of Osuna. (CRISTINA QUICLER / AFP/Getty Images)

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Indira Varma is on the set of “Game of Thrones” at Real Alcazar on Oct. 19, 2014, in Seville, Spain. (Europa Press / Europa Press via Getty Images)

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Actors film “Game of Thrones” at Real Alcazar on Oct. 19, 2014, in Seville, Spain. (Europa Press / Europa Press via Getty Images)

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Nikolaj Coster-Waldau is on the set of “Game of Thrones” at Real Alcazar on Oct. 19 in Seville, Spain. (Europa Press / Europa Press via Getty Images)

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Sylvester Stallone poses with his puppet as he takes part in the TV show “Le Grand Journal” at the Cannes Film Festival. (LOIC VENANCE / AFP/Getty Images)

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Jamie Foxx filming “The Amazing Spider-Man 2” on April 21, 2013, in New York City. (Aby Baker/Getty Images)

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Actor Andrew Garfield, center left, is seen on the set of “The Amazing Spider-Man 2” in New York City with his stunt double William Spencer, right, and a second stunt double. (Raymond Hall/ WireImage/Getty Images)

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Actor Andrew Garfield, right, rehearses a scene with his stunt double William Spencer on the “The Amazing Spiderman 2” movie set in Madison Square Park in New York.

(Ray Tamarra/Getty Images)

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Actor Andrew Garfield, right, his stunt double William Spencer, center, and a second stunt double are seen on the set of “The Amazing Spider-Man 2” in New York City. (Raymond Hall/ WireImage/Getty Images)

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Jamie Foxx filming on location for “The Amazing Spider-Man 2” on April 21, 2013, in New York City. (Bobby Bank/WireImage/Getty Images)

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Andrew Garfield and Emma Stone filming “The Amazing Spider-Man 2” on location in New York City. (Aby Baker/Getty Images)

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Jamie Foxx as Electro/Max Dillon in “The Amazing Spider-Man 2” on location in New York City. (Bobby Bank/WireImage/Getty Images)

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Actor Paul Giamatti films a scene at the “The Amazing Spiderman 2” movie set in Madison Square Park on June 22, 2013, in New York City. (Ray Tamarra/Getty Images)

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Actor Andrew Garfield is seen on the set of “The Amazing Spider-Man 2” in New York City. (Raymond Hall/WireImage/Getty Images)

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Actor Paul Giamatti is seen on the set of “The Amazing Spider-Man 2” in New York City. (Raymond Hall/WireImage/Getty Images)

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Actor Paul Giamatti on the set of “The Amazing Spiderman 2” in New York City’s Madison Square Park. (Ray Tamarra/Getty Images)

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Jamie Foxx on location for “The Amazing Spider-Man 2” in New York City. (Bobby Bank/ WireImage/Getty Images)

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Julianne Moore and Kristen Stewart play mother and daughter filming on location for “Still Alice” on March 21, 2014, at Lido Beach, N.Y. (Steve Sands/Getty Images)

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Richard Gere on the set of “Time Out Of Mind” on March 26, 2014, in New York City. (Bobby Bank/WireImages/Getty Images)

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Jeremy Renner films an action scene in Aoasta, Italy, for “Avengers: Age of Ultron.”. (Photopix/Getty Images)

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Elizabeth Olsen and Aaron Taylor-Johnson film on location in Pont-Saint-Martin in Aosta, Italy, for “Avengers: Age of Ultron.” (Photopix/Getty Images)

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Actors are suited up for special effects on the set of “Avengers: Age of Ultron” in Aosta, Italy. (Photopix/Getty Images)

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Richard Gere and Ben Vereen on the set of “Time Out Of Mind” on March 26, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Arnold Schwarzenegger performs on the set of “Despierta America” with Joe Manganiello at Univision Headquarters in Miami. (Gustavo Caballero/Getty Images)

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Donal Logue, left, and Ben McKenzie on the set of “Gotham” on March 20, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Kevin McHale, left, Chord Overstreet, Chris Colfer and Darren Chris on the set of “Glee” at Washington Square Park on March 14, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Lea Michele and Michael Lerner on the set of “Glee” on March 16, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Louie CK on the set of “Louie” on Jan. 31, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Wil Estes and Vanessa Ray on the set of “Blue Bloods” on Jan. 31, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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Skyler Gisondo and Ben Stiller on the set of “Night at the Museum 3” on Feb. 6, 2014, in New York City. (Bobby Bank/WireImage/Getty Images)

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George Clooney, second from left, filming “Tomorrowland” at Ciudad de las Artes y las Ciencias on Jan. 21, 2014, in Valencia, Spain. (Europa Press/Europa Press via Getty Images)

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Kevin Bacon and Sprague Grayden on the set of “The Following” on Dec. 10, 2013, in New York City. (Bobby Bank/WireImage/Getty Images)

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Mark Wahlberg is seen on set filming the movie ‘Transfomers 4: Age of Extinction’ on Sunday October 27,2013 in Hong Kong,China. (TPG/Getty Images)

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Mark Wahlberg performs on the set of “Transformers: Age of Extinction” in Hong Kong on Oct. 26, 2013. (Aaron Tam/ AFP/Getty Images)

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Scarlett Johansson filming a scene for her new movie, “Lucy” on Oct. 21, 2013, in Taipei, China. (TPG/Getty Images)

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Director Clint Eastwood, right, and actor John Lloyd Young as Frankie Valli on the set of “Jersey Boys” in Kearny, N.J. (Bobby Bank/WireImage/Getty Images)

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Edie Falco, left, and Julie White on the set of “Nurse Jackie” in New York City. (Bobby Bank/WireImage/Getty Images)

By Ryan Faughnder

Aug. 7, 2013 10:02 AM PT

“America’s Got Talent” is doing back-flips over the Tuesday night competition. The live Aug. 6 episode on NBC, featuring a standout performance by acrobatic team Chicago Boyz, was the most-watched and highest-rated broadcast of the night.

The two-hour competition program drew an average of 9.3 million viewers and scored a 2.5 rating in the key 18-49 demographic, according to preliminary numbers from Nielsen. That’s down about 7% from last Tuesday’s key-demographic rating. A ratings point equals about 1.3 million viewers.

PHOTOS: Cable versus broadcast ratings

NBC won the ratings with an 7.43 million viewers overall and a key-demographic rating of 2.

“So You Think You Can Dance” on Fox also dropped this week. It hooked 4.04 million viewers and had a 1.3 in the 18-49 demographic, down from last week’s 1.4.

ABC’s “Extreme Weight Loss” grew its overall audience 8% from last week, to an average of 3.89 million viewers.

CBS, still dealing with a carriage dispute with Time Warner Cable, aired repeats.

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Twitter: @rfaughnder

ryan.faughnder@latimes.com