Australian pop duo The Veronicas have denied reports they have undergone cosmetic surgery - insisting their look is "100 percent natural."

Twins Jessica and Lisa Origliasso, 24, are famous for drastically changing their appearance - with both sporting a variety of different hair colors. The pair was recently rumored to have undergone a series of operations, with many online gossips suggesting they may have had surgery on both their noses and jaw lines.

However a representative for the singers has dismissed the stories as untrue, telling Australian newspaper the Sydney Morning Herald, "(They) absolutely haven't had any plastic surgery - they are 100 percent natural."

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(This news article provided by World Entertainment News Network)