The 40-year-old has slammed the likes of Lauren Goodger, Sam Faiers, Chloe Sims and Jessica Wright.
She told British newspaper the Daily Star: 'They have the thickest make-up you have ever seen and the longest lashes. It really is like a full-time job for these girls.
'Some of them have made it into an actual art form. It is very elaborate.'
Dannii added: 'Some people naturally know how to dress, others don't. I didn't when I started.
'There are very few women who are stylish and know what works for them. It's just a case of deciding what does it for you.'