Eyelash extensions cost between $150 and $300 for a full set, meaning 80 to 150 extensions per eye, TODAY.com previously reported. Touch-ups cost $75 to $100 every two to three weeks.

Don't wet your extensions for the first 48 hours. If you're one of the many extension wearers who gets your lashes either damp or soaking wet within the first 24 hours after application, stop.

Eyelash extensions are growing in popularity. But what many women may not know, is that the industry is completely unregulated. So if you're not careful, instead of getting gorgeous Hollywood ...

For most, eyelash extensions will last the length of the natural growth cycle of your eyelashes. Many choose to pay Castellanos a visit every two weeks for maintenance.