Adam

Adam Lusk (Born January 15, 1996) is one of many teens on Teens React. He made his first appearance on Teens React in the episode "Teens React to Twilight". 

Before Teens React

Not much is known about Adam before Teens React. He was not on Kids React. 

Teens React (2011-present)

Adam made his first appearence on Teens React on Teens React to Twilight and has made a steady ammount of appearances on Teens React since then.