Siobhan is an Irish singer and tin whistle player who is renowned for her on stage shenanigans and audience interaction.

In 1993, she discovered her passion for music and started in her first band. She's had the pleasure of playing with several Irish folk groups, including The Chancers, The Islanders, Connemara Blue, and the Green Light Band with Jimi Slevin.
In 2008, she joined John at the Laubacher Lichter Fest, and the beginnings of Celtic Tree was formed.

Siobhan also plays in a duo called '2 DO', covering classic oldies.