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Arthur Ashe Kids' Day - The U.S. Open kicked off on Aug. 26 and while millions of Americans have been watching the competition at home, celebrities are taking in the action from the front row. Check out stars spotted at the 2013 U.S. Open. —Dominique ZonyééDenis Kudla, Sloane Stephens, Serena Williams, Jack Sock, first lady Michelle Obama, Melanie Oudin, Donald Young, Christina McHale, Ryan Harrison and Madison Keys pose for a photograph at the 18th Annual Arthur Ashe Kids’ Day on Aug. 24.(Photo: AP Photo/Frank Franklin II)

Photo By AP Photo/Frank Franklin II

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Gladys Knight and Selita Ebanks - Musician Gladys Knight and model Selita Ebanks hung out at the Moet & Chandon suite on Sept. 8.(Photo: Brad Barket/Getty Images for Moet & Chandon)

Photo By Photo: Brad Barket/Getty Images for Moet & Chandon

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Amar'e Stoudemire - Amar'e Stoudemire watched Serena Williams win her fifth U.S. Open title on Sept. 8.(Photo: Al Bello/Getty Images)

Photo By Photo: Al Bello/Getty Images

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Ne-Yo - Ne-Yo serenaded the crowd at the women's singles final match between Victoria Azarenka of Belarus and Serena Williams on Sept. 8.(Photo: Al Bello/Getty Images)

Photo By Photo: Al Bello/Getty Images

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Naomi Campbell and Maxwell - Model Naomi Campbell and singer Maxwell shared a moment at the Moet & Chandon Suite on Sept. 6.(Photo: Brad Barket/Getty Images for Moet & Chandon)

Photo By Photo: Brad Barket/Getty Images for Moet & Chandon

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Joy Bryant - Actress Joy Bryant hung out in the Moet & Chandon Suite on Sept. 8.(Photo: Brad Barket/Getty Images for Moet & Chandon)

Photo By Photo: Brad Barket/Getty Images for Moet & Chandon

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Michael Strahan - Former NFL player, anchor and commentator Michael Strahan got to take in some tennis before football season started on Sept. 4.(Photo: Al Bello/Getty Images)

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Star Jones - Star Jones caught the women's singles quarter-final match on Sept. 3.(Photo: Mike Stobe/Getty Images for the USTA)

Photo By Photo: Mike Stobe/Getty Images for the USTA

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Spike Lee - Director and sports fan Spike Lee enjoyed day six of the U.S. Open on Aug. 31.(Photo: Chris Trotman/Getty Images for the USTA)

Photo By Photo: Chris Trotman/Getty Images for the USTA

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Lenny Kravitz - The Butler star and musician Lenny Kravitz rocked out on the opening night celebration at the USTA center in Flushing, Queens, on Aug. 26.(Photo: Anthony J. Causi/Splash News)

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Robin Roberts and Pam Shriver - TV personality Robin Roberts and Pam Shriver hung out as they watched the first round match on day one on Aug. 26.(Photo: Matthew Stockman/Getty Images)

Photo By Photo: Matthew Stockman/Getty Images