Caroline Lavelle is an English singer-songwriter and cellist who has created three solo albums and contributed vocals, music, and production help to many other artists and bands.

Loreena Isabel Irene McKennitt is a Canadian singer-songwriter, multi-instrumentalist, and composer who writes, records, and performs world music with Celtic and Middle Eastern influences. McKennitt is known for her refined and clear soprano vocals. She has sold more than 14 million records worldwide.