Pop star Lady Gaga wowed thousands of fans at a free concert in New York's famed Central Park on Friday when she made a grand entrance by flying in on a zip line.
 
The hitmaker kicked off breakfast show "Good Morning America's" annual Summer Concert Series by performing a four-song gig, beginning with her hit single "Bad Romance."
 
The star went on to sing "The Edge of Glory" and "Judas," before wrapping up her mini-show by belting out her new single "Hair" on a unicorn piano.
 
Gaga wasn't the only pop star performing in town - Rihanna helped rival morning program "The Today Show" launch its own summer shows in nearby Rockefeller Center, taking to the stage to sing tracks including "Only Girl (In The World)" and "What's My Name?"

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