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NEW YORK, NY - AUGUST 20:  Serena Williams joins Delta Air Lines for the Delta OPEN Mic, a private karaoke event in celebration of her upcoming defending tennis championship and magazine cover profile with celebrity guests and friends at Arena, on August 20, 2014 in New York City.  (Photo by Bryan Bedder/Getty Images for Delta)
NEW YORK, NY - AUGUST 20:  Serena Williams joins Delta Air Lines for the Delta OPEN Mic, a private karaoke event in celebration of her upcoming defending tennis championship and magazine cover profile with celebrity guests and friends at Arena, on August 20, 2014 in New York City.  (Photo by Bryan Bedder/Getty Images for Delta)

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Serena Williams, Karaoke queen gears up for Grand Slam

As she prepares for the U.S. Open - and a possible calendar Grand Slam - Serena Williams talks to CNN about the U.S. Open and her passion for karaoke.

Serena Williams, Karaoke queen gears up for Grand Slam

As she prepares for the U.S. Open - and a possible calendar Grand Slam - Serena Williams talks to CNN about the U.S. Open and her passion for karaoke.