The `Gossip Girl` star hated her teenage years so much, she would avoid going to class and on occasions she experimented with "pot" - a term commonly used to describe the illegal drug - with friends.
She said: "It`s funny that I`m now getting to live through what school should have been - glamorous and full of parties. But I didn`t do any of that stuff. I hated school.
"I`d do anything but be in school, so I`d skip class. I wasn`t dating around, but we`d smoke pot."
The 23-year-old singer-and-actress found school a struggle because her peers gave her a hard time for working part-time as an actress while she studied.
Two unkind classmates even told her she looked "kind of fat" and was a "dork".
She recalled: "School is not fun for most people, but the people who do have fun are usually making fun of other people, which sucks. By no means did I have a conventional upbringing, but I was brought up with love. I don`t believe it matters what kind of place you come from.
"I didn`t tell people I was an actress. Then one day, I went into school and someone was holding a magazine and they were, like, `Is this you?` It was just a small photo spread - I was 14 - and I said, `Yeah, it`s me,` and they were, like, `Man, you are such a dork.`
"One of them said, `You`re bigger on TV.` I said, `What do you mean?` And they said, `Well, you look kind of fat`. Kids are so mean! What`s wrong with them?"