A French tourist who fell pregnant after a holiday romance on the Sunshine Coast has posted her story online to try to track down the father.

Natalie Amyot has returned to Mooloolaba and posted a video to YouTube pleading for help to find the tanned, blond man who she met on her last night in the country.

"I met this really cute guy, and for me it was love at first sight, and we had a beautiful night... the next morning I flew home to Paris, and I lost my phone with his number on it," she said.

"So I had no way to contact him, and six weeks later I found out that I am pregnant, so I've come back here to try and find him, as I have no family of my own."