Miley vs Gaga: Craziest pop star battle

Singer Miley Cyrus sticks are tongue out in a very Miley characteristic manner while leaving the 'NRJ' radio station on September 9, 2013 in Paris, France. (Getty Images)

(Getty Images)

Miley Cyrus is seen leaving the 'NRJ' radio station on September 9, 2013 in Paris, France. (Getty Images)

(Getty Images)

(Getty Images)

Singer Lady Gaga leaves the 'Good Morning America' taping at the ABC Times Square Studios on September 9, 2013 in New York City. (Getty Images)

(Getty Images)