The 26-year-old Canadian singer has flown Down Under to promote her latest album, Goodbye Lullaby, and took time out from her promotional schedule to catch a few waves.
Taking to Twitter she wrote, 'Just surfed on a 4 ft wave on a 7ft board in manly OZ. My smallest board and biggest wave to date !!!
'I'm tired now haha. Gonna upload WTH.TV soon of me surfing :) (sic)'
Lavigne also visited Sydney's Taronga Zoo, where she got up close and personal with some of the natives.
'Omg just went to the zoo and got to touch koala bears and kangaroos!!!!! Wow! (sic)' she Tweeted, before sending boyfriend Brody Jenner's stepsister Kim Kardashian a picture of her favourite Aussie chocolate snack – Tim Tams.
She told Kim, 'I actually had some waiting for me in my hotel room.... Ur right.. Pretty good (sic).'