Love it or hate it, botox is one of the tip-top topics of Tinseltown.

Which celebrities are speaking out on the wrinkle-stopper and what exactly is botox?

According to Examiner.com, Botulinum toxin Type A (Botox) was primarily used to treat muscle spasms before gaining popularity as a cosmetic treatment.

Now, botox better known as a non-surgical aesthetic treatment administered by a doctor to treat frown lines. Botox works by reducing the contractions of the muscles that cause the frown lines that develop as people age.

Here's the celeb list of Botox users:

- Jenny McCarthy, 36, says she goes for Botox every 2 months, "My tricks are I get Botox in my forehead – I just have my doctor do a little shoter there. If you overdo, it looks bad."

- Vanessa Williams, 45, is a fan of Botox – even her character on Ugly Betty has her gay assistant give her Botox injections in her office. Vanessa gets injections in real life every 3 months.

- Daisy Fuentes, 42, uses Botox, "There’s a right time for things like Botox as you get older."

There are the nay-sayers too:

- Jennie Garth says she didn't have a good first experience with Botox. She told her doctor next time she wanted less. "I don’t want my face to change."

- Jennifer Aniston has admitted she once tried Botox and wasn’t a fan. "I tried Botox once. I felt like I had a weight on my head. You see women, you know they’re not young, but you can’t tell how old they are."

What do you all think of Botox. Yay or nay?