"50/50 & Lullaby" is a double A-side single from British R&B singer Lemar, his third single, and the lead single from his debut album Dedicated. "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 UK, peaking at #5 there in November 2003.