Noughties one hit wonder looks completely unrecognisable as she jets into Sydney- but can YOU guess who it is?

Sandi Thom looked completely unrecognisable on Wednesday when she was spotted arriving at Sydney Airport ahead of her upcoming Australian tour.

The one-hit wonder, 43, who briefly shot to fame following the success of her song I Wish I Was A Punk Rocker in 2006, kept a low profile as she made her way through the busy arrivals area.

The performer sported a very casual look in an unbuttoned denim jacket paired with a plain white blouse and black tights.

She completed her look with grey sneakers and a large white scarf wrapped around her neck.

The Scottish singer had her hands full wheeling a trolley loaded with suitcases and a large guitar case.

Sandi allowed her brunette hair to hang freely around her shoulders and highlighted her natural beauty by going makeup-free.

The British performer sported a focused expression as she made her way through the bustling airport.

She will be performing three shows across New South Wales as part of her tour, first taking the stage at Brass Monkey in Cronulla, Sydney, on Thursday night.

Sandi will then perform in regional NSW on both Friday and Saturday night.

The singer shot to fame in 2006 with her catchy folk-pop song I Wish I Was A Punk Rocker (With Flowers In My Hair).

The song reached number one in both Australia and the UK, and helped her launch her music career.

However, her subsequent releases did not reach the same heights, and Sandi quickly became known as a one-hit wonder.

After years of slaving away to get her music out there, Sandi finally cracked under the pressure in 2015 when she couldn't get her song Earthquake onto the radio.

According to her teary and explicit outburst on Facebook, the blame for that laid at the feet of those choosing the playlist for national radio stations.

She said despite specifically tailoring the song to the liking of commercial broadcaster Bauer Media and their audience, they refused to play it on the radio.

'That is basically 22 million people across the country who will not get to hear this song because of one person's decision,' she ranted.

'Honest to God I'm f**king sick to death of the bulls**t this industry pulls on people like me and I've had it. Enough. I'm done.

'F**k you Radio 2. F**k you Bauer network and f**k the lot of you.'