It may be the music industry's most famous tongue.
Rarely is her picture taken without the tongue featuring in some way - even in music videos she uses it to good effect.
Now Miley Cyrus has given an explanation why her tongue is usually out whenever her picture is taken.
"I get embarrassed to take pictures. That’s actually the truth," she told Barbara Walters in an interview for Barbara Walters Presents: The 10 Most Fascinating People of 2013.
"I’m so embarrassed, because people are taking pictures of me, and I just don’t know how to – I don’t know how to smile, and just be awkward, so I stick my tongue out, because I don’t know what else to do,' she said.
She also talked about calling off her engagement to Liam Hemsworth, saying that she was scared of ever being alone.
"I think, conquering that fear, this year, was actually bigger than any other transition that I had, this entire year.'
"I don’t ever want to have to need someone again, where you feel like, without them, you can’t be yourself."
"I wait for those moments of silence, when I’m just at my house, by myself," she told Walters.
Of the split from Hemsworth, she said: "I don’t think there was any, any lies."