Australian shoppers have discovered what they claim to be the 'perfect dupe' for a popular $400 designer perfume - and it costs just $25. 

In a post to popular Facebook group, a beauty fan said she nabbed JLo's One perfume from Chemist Warehouse for $25 and it smelled just like the $433 Le Labo Santal 33 fragrance.

'I brought this perfume from Chemist Warehouse the other day because it smelt amazing but also really familiar,' she wrote. 

'I couldn't quite put my finger on what scent it reminded me of so I googled if it's a known dupe for anything and it turns out it's a dupe for Le Labo Santal 33!' 

The fragrance enthusiast said she is 'in love' with the 'beautiful' scent that lasts all day. 

Both perfumes have woody and floral notes with hints of leather and sandalwood. 

Fellow beauty lovers in the comments expressed their excitement and said they were keen to get their hands on the affordable dupe. 

'Boom!

And a thousand bottles are now bought!' one woman wrote. 

'I bought it today it smells feminine, and fresh! I like it,' another commented. 

In an earlier thread, another member asked for cheaper dupes of the ultra-popular Baccarat Rouge 540 by Maison Francis Kurkdjian which can go for up to $744 and drew in dozens of comments recommending Ariana Grande's perfume Cloud. 

'I have this and cloud by Ariana Grande, I had my family guess which was which and absolutely no one could tell the difference,' one member said. 

'I'm kind of embarrassed to admit to loving a celeb fragrance but Cloud is awesome.

I have one open and two spares in my wardrobe,' a second admitted. 

Grande's best-selling fragrance is just $50 for a 100ml bottle from Chemist Warehouse and is a slightly sweeter version of the Baccarat Rouge.