There are at least four artists called Sleepy. 1. Sleepy is a Korean rapper from the band Untouchable. 2. Sleepy (full name: Alex Sleepy) is a trip-hop artist from Kiev, Ukraine. 3. (The) Sleepy were a short-lived psychedelic rock band from the United Kingdom that had two 45s released on CBS in 1968. The first single ('Love's Immortal Fire') was released as The Sleepy, but the second single ('Rosie Can't Fly' b/w 'Mrs. Bailey's Barbecue and Grill') as Sleepy.