50/50 &amp; Lullaby50/50 &amp; Lullaby 50/50 & Lullaby "50/50 & Lullaby" is a double A-side single from British R&B singer Lemar. It is his third single and the second single from his debut album, "Dedicated" (2003). "50/50" contained a sample of Jay-Z's "Can't Knock the Hustle" while "Lullaby" was a track co-written with fellow Fame Academy contestant Ainslie Henderson. The single became Lemar's second top-five hit in the United Kingdom, peaking at number five there in November 2003. It also reached number 49 in Ireland the same month. Track listings. CD 1 CD 2 12-inch vinyl 50/50 & Lullaby "50/50