Iggy Azalea wants to ''crawl into a cave'' sometimes.

The 'Fancy' hitmaker, who recently sparked speculation she's had a chin implant and previously revealed she got breast implants, admits she still struggles with poor self-esteem, but doesn't think it is possible to be ''confident 100 percent of the time.''

The 25-year-old singer told the 'Today' show in her native Australia: ''Some days I want to crawl into a cave because I don't feel confident at all, and then other days I feel great.

''I think it's like that for all human beings, not just young women. I think being confident 100 percent every day is something to aspire to, but I don't think it's humanly possibly for anybody.''

The blonde beauty recently got engaged to her long-time boyfriend Nick Young, but is planning to tie the knot in the US in 2016 because his family is too large to fly to Australia.

Asked about what kind of dress she would like to wear down the aisle, she said: ''Glamorous and big.''

LA Lakers player Nick surprised Iggy by getting down on bended knee with a $500,000 ring during his 30th birthday celebrations in Los Angeles earlier this month.

The couple first started dating in October 2013 and bought a lavish home together from Selena Gomez late last year.