Iggy Azalea's Underwear Rules

The stunning Iggy Azalea was in Sydney on Wednesday to celebrate Bonds’ 100th birthday.

We caught up with the 25-year-old Aussie rapper and Bonds brand ambassador at the exclusive birthday bash and asked her to rate some undies for us.

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See which undies the Mullumbimby-raised performer, who recently got engaged to LA Lakers star Nick Young, says “are a yeast infection” and which ones get her tick of approval.

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We also spoke to other Bonds ambassadors including Pat Rafter, Samara Weaving, Paul Mercurio and Hamish and Andy to hear their thoughts on the best – and worst – type of underwear.