How do you write sweet sixteen in Japanese?

In Japanese, "sweet sixteen" is typically written as スウィートシックスティーン (suwīto shikkusutīn) using katakana for the phonetic representation. Alternatively, it can be expressed as "16歳の誕生日" (16-sai no tanjōbi), which means "16 years old birthday." The context usually determines which form to use.