"50/50 & Lullaby" is a double A-side single from British R&B singer Lemar. It was released as the second single from his debut album, Dedicated (2003). "50/50" contains a sample of Jay-Z's "Can't Knock the Hustle" while "Lullaby" is a track that Lemar co-wrote with fellow Fame Academy contestant Ainslie Henderson. The single became Lemar's second top-five hit in the United Kingdom, peaking at number five on the UK Singles Chart in November 2003. It also reached number 49 in Ireland the same month.