Lee last night posted a picture of herself and her son in the delivery room on Instagram and said: "Our little cub is here. I have never known the depths of my heart until now. The world just exploded into technicolor."

Evanescence have been on hiatus since ending the tour in support of their self-titled third album in 2012. Lee sued their former record label for unpaid royalties earlier this year and the band were released from a related contract in March.