Sera Owen is a full-time singer and has been performing and composing for years. This will be her second appearance on the Cân i Gymru stage after previously taking part in 2009.
"I would describe the song 'Oes yn Ôl' (A Long Time Ago) as folky acoustic pop. The song sounds simple at the start with guitars but then it really gets going with folk and country instruments like fiddles and ukeleles" says Sera, who's originally from Caernarfon.
What do you think of Sera's song? Let us know by using the hashtag #oesynol