A Little Agency: Melissa

I'm assuming you're referring to the TV series "A Little Bit of Heaven" or possibly "Little Agency" but I think you might be referring to Melissa George an Australian actress who played in the drama series "Mulheres de Areia" and then there was the series A Little Bit of Heaven which had a character called Melissa. However I found that A Little Bit Of Heaven had no main character called Melissa.