Ellen Joyce Loo is a Hong Kong Canadian singer-songwriter, member of the Hong Kong electrofolk and cantopop musical group at17. She was born in Canada on March 27, Loo learned classical guitar from her father at the age of nine. She entered the musical competition "Original Music 2000" (原音2000) held by Tom Lee Music with her older brother P.J. Loo in Hong Kong, and together they won third prize. Loo was later signed by the music production company People Mountain People Sea and formed the group at17 with Eman Lam.