The hot new trend. Eyelash extensions. Have you heard about them? Some are warning that the trend isn't so safe and take away what little lashes you have. Abbie boudreau explains. ♪ What I... See More
The hot new trend. Eyelash extensions. Have you heard about them? Some are warning that the trend isn't so safe and take away what little lashes you have. Abbie boudreau explains. ♪ What I want to be ♪ Reporter: The longer your lashes, the better? ♪ Something in the water ♪ Reporter: If you ask katy Or nicki minaj. ♪ Reporter: The answer is yes. Some women are turning to eyelash extensions to make their eyes pop. But can they be dangerous? It works like I have ripped on my eyelids. Reporter: When kristin chenoweth tried out the popular trend she had a different reaction. An allergic one. Can you see? Reporter: Eyelash extensions are typically made of synthetic finers which are glued on to the natural eyelashes. Many times with formaldehyde-dazed adhesive which cause allergic reactions for some. They're warning women with longer lashes may not be worth it. The hidden dangers with eyelash extensions include infection, allergic reaction, irritation, and loss of your natural lashes. I wanted to feel like if i walked out of the house with nothing else my eyelashes would look good. Reporter: Tiffany was going for a cat eye look. Adele has fabulous lashes. Reporter: At first she said she loved her new lashes but then they started growing out. So I kneed to take them out and when I did so unfortunately out came my lashes with the extensions. Any chemical exposure with the cornea being so susceptible to scarring and infections and irritation, then it could be harmful. Reporter: The association of damage-free eyelash extension tellsbc news properly applied eyelash extensions are not dangerous and that the adhesive should not contain formaldehyde and hypoallergenic adhesives are available. Luckily for tiffany howard her eyelashes grew back. Was it worth it? Oh, absolutely not. Reporter: And now she's back to the basics. I haadele's got nothing on me. Reporter: For "good morning america," abbie boudreau, abc news, los angeles.
This transcript has been automatically generated and may not be 100% accurate.