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The star instead has a choppy fringe and bright pink locks, and prefers dramatic makeup featuring dark eyeliner and pink eyeshadow.
She looked trendy during her Australian TV appearance in a fluffy neon jacket, and accessorised with a choker necklace and earrings.
'Its been a lot of experimenting and trying': The singer, 23, looks hardly recognisable these days, a decade after becoming an overnight viral sensation
Rebecca, who has recorded a new version of Friday for its tenth anniversary, spoke to hosts Larry Emdur and Kylie Gillies about her changing style.
'I dye my hair because I like my hair like this, I wear clothes that I like, and I had no idea what I was doing at 13,' she said.