The short clips - including a tour of her bedroom, a comic skit about Facebook usage and another detailing her "typical" day at school - are all inspired by everyday life.
Friends give her suggestions, too, but it is usually their actions that kick-start her imagination.
"It's the way they act. I had a friend who spat in my face, which was the inspiration for a video."
Each night she uploads something new and within minutes they have thousands of views. The overnight popularity is "cool" but has taken getting used to.
"It's kind of freaky. I remember at the start, someone from Christchurch messaged me and I was like, 'wow'.
"Then after about five months it was people from Auckland, Italy, Belgium."
Along the way, she had encountered a few unsavoury characters who had to be blocked from the page, but most were genuinely friendly.
"I had one person message me my address, which was weird, but I do love meeting new people and getting their feedback. It's great seeing their reactions."
As of last night, her page had almost $700,000 "likes" but that is expected to grow with increased exposure from radio, newspaper and television interviews.
Her largest audience is made up of New Zealanders, but she also boasts over 200,000 followers from Australia and 90,000 from Italy.
"I got to 1000 likes within a month. I used to think it was really cool when I would get 100 new likes a day, then it was 300, now I would get over 1000. I never get ungrateful, though, like, 'oh, I only got 500 today'."
Last weekend she scored a record 24,000 overnight.
Jamie is self-taught, with no official drama training or help behind the camera, but she eventually hopes to launch a career in that area.
It seems she is already a convincing actress - anyone who has seen her page will attest to her love of Hollywood hunk Channing Tatum, whom she often refers to as her boyfriend - but Jamie claims it's all a farce.
"I just did one photo because all of my friends liked him. I am not actually obsessed with him but I can't change it now, and I guess he is pretty hot."
While her many characters on video scream confidence, Jamie admits she hasn't always been so outgoing.
"I think Sacred Heart College has helped me to be a lot more confident."
These days she is not afraid to make a fool of herself - wearing geeky outfits, messing up her hair or pulling outrageous faces. Even her braces are a running joke.
Life offline is far more mundane, however, with most of her spare time taken up with homework - "there's just always so much to do".
She stays grounded by playing soccer for her local club or hanging out with friends.
If you ask Jamie, she's just your regular Year 12 student, except these days she won't leave home with a hair out of place, in case someone recognises her.
"I'm not really famous, I don't really even leave the house that often, so I'm not going to get a big head."