The 21-year-old singer says she only sticks her tongue out when she gets her picture taken because she gets embarrassed at being the centre of attention, reported Femalefirst.
"Its because don't like getting my picture taken, I kind of get embarrassed. You don't see it, on the red carpet the people taking your pictures are yelling at you. And it gets you a little nervous. They're screaming I don't know what to do so I just stick my tongue out because I don't know what else to do," Cyrus said.