The 20-year-old 'We Can't Stop' hitmaker was criticised heavily for her tongue waging and twerky performance with Robin Thicke on 'Blurred Lines' at this year's MTV Video Music Awards, reported People magazine.
"I was an adult when I was supposed to be a kid. So now I am an adult and I am acting like a kid," Cyrus said.
The singer's relationship with fiance Liam Hemsworth is reportedly going through a rough phase.
"I definitely don't have time to deal with a wedding right now. But I will at some point," she said.