Listen to Greensleeves: Sleep Angels online. Greensleeves: Sleep Angels is an English language song and is sung by Natural White Noise, New Age Deep Massage and Zen Meditation. Greensleeves: Sleep Angels, from the album Serenity: 101 Relaxing Spa Music Songs, Sound Therapy for Relaxation With Sounds of Nature: Baby Sleep, Study and Yoga, was released in the year 2012. The duration of the song is 1:17. Download English songs online from JioSaavn.