"Can't Sleep, Can't Eat, I'm Sick / Ningyo" is Namie Amuro's 30th solo single under the Avex Trax label. It was released on CD and CD&DVD May 17, 2006, six months after her last single "White Light/Violet Sauce". Although she has had Japanese song titles prior to signing with Avex Trax, "Ningyo" or "人魚" which means mermaid, is her first with the label. "Can't Sleep, Can't Eat, I'm Sick" is featured on the album Play, although the latter A-side, "Ningyo" or "人魚", was excluded.