She is a South Korean citizen, and has represented Thailand in junior team competition, but she has spent much of her life in the United States.

The next year she placed first individually at the World Amateur Team Championships (Espirito Santo Trophy) and helped Thailand to a second-place finish.

In her rookie season, she finished second at the Kraft Nabisco Championship and ended the year 28th on the money list.

In 2007, Song suffered a lack of energy and continued to struggle, dropping to 88th place on the official LPGA money list.

She sat out all of 2008 due to health problems including severe irritable bowel syndrome and adrenal insufficiency.