Carly

Carly is a woman who appeared in Five Days of F.L.A.R.G., she and Timmy had tattoos of each other's names put on themselves during the "Amnesia" day of F.L.A.R.G.

Background
When Timmy woke up after the Amnesia day of F.L.A.R.G., he realized he could not remember anything from what Mark Chang described as the best party ever, which was even more strange because he had a heart shaped tattoo with the name "Carly" on it. Later in the episode, Timmy runs into an extremely attractive woman named Carly who has Timmy's name tattooed on her.

Description
http://images3.wikia.nocookie.net/inciclopedia/images/4/4d/Carly.gif

Trivia

 * Carly is the name of one of Butch Hartman's daughters.