The 25-year-old likes to use the social networking page to let fans know about more about her.
She told People.com: 'I believe in no regrets. You say what you feel because you felt it at the moment.
'It's sort of like what I would tell a reporter if I were doing an interview.'
Bynes added: 'You kind of have to let people know a little bit about you. And once you've been in the business for a long time, people kind of know stuff about your life.
'I don't tell anybody anything too personal. But I say stuff I would say in an interview.'
However, Amanda does try and keep some things to herself.
She added: 'I don't like talking about [dating].
'But when I'm getting married, I'll be open about that.'