A 16-year-old girl who has collected photographs of herself with almost 5,000 of the world's biggest stars, is now becoming famous in her own right.

The bespectacled teenager, from Los Angeles, uses the pseudonym Stalker Sarah (or often Sarah M) and has posed alongside every A-lister from Brad Pitt and Angelina Jolie, to Kim Kardashian and Oprah.

She has become such a presence on the red carpet, that many celebrities, such as Justin Bieber, even know her by name.



Friend of the stars: Stalker Sarah, who has almost 5,000 photos of herself with celebrities, with Angelina Jolie



Star quality: The 16-year-old, pictured here with Brad Pitt, is now becoming famous in her own right

She posts her photos on Flickr and Twitter, where there is a new addition to her album every day or two.

Sarah told Good Morning America how her unlikely hobby began four years ago, when she was just 12.

She had been at an arcade with her father, when they spotted one of his favourite actors, Robert Hays.



Gentle approach: Sarah's polite manner allows her to charm stars like Julia Roberts into posing with her



Kaptured on Kamera: Sarah strikes a pose with reality star Kim Kardashian



The Twilight zone: Meeting teen heartthrob Robert Pattinson was a real thrill for the schoolgirl
'I knew him [Hays] as the dad from Homeward Bound. My dad liked Airplane and he happened to have a camera in the car so I took a picture with him.'

Her father is still her biggest champion, and drives her to each star-studded event - on one condition.

'As long as I got straight A's in school he would take me to every event that he possibly could,' she explained.

'I got straight A’s and he had to keep that deal.'

The secret to her success, Sarah says, is that she is not aggressive when approaching a star.

'I always know the right situation,' she told GMA. 'So normally if I don’t think it’s going to be good for them, if I don’t think they look right or I don’t think they’re going to want to take a picture, I just don’t ask.

'I’ve been in a lot of really private situations with people where I don’t even ask for a picture.
'I see Miley around the neighborhood. I see Hilary Duff walking her dog all the time. And I hadn’t even had a picture with Hilary Duff yet, and she’s one of my favorites. But I’m like no she’s walking her dog.'

But, she admits, there is one major star she would like to be photographed with more than any other.

'Britney Spears,' she admitted. 'I see her a lot and I have met her and I have talked to her but it’s another one of those situations where it’s at the park or she’s with her kids and just not approachable.'