How young is too young for Botox?

The real housewives of Atlanta and New Jersey have had it done "on camera" and many actresses have had the procedure to Botox is one of the most popular anti- aging treatments out there right now, but there's a lot of outrage over it because this -18- year old singer got Botox injections.

Charis Pempengco just landed a role on the Fox hit show "Glee" and says she got Botox and a skin- tightening procedure to look fresh on camera. Later her spokesperson said she got the injections because of a jaw problem similar to TMJ.

So how young is too young for someone to get Botox?