"Ain’t Misbehavin’" isn’t just a jazz tune – it’s one of the defining songs of the Harlem Renaissance. Written by Thomas ‘Fats’ Waller together with Harry Brooks and Andy Razaf, it first appeared in the all-Black musical revue Hot Chocolates in 1929. The song became an instant hit, blending playful lyrics about loyalty with Waller’s irresistible swing feel. Fun fact: Waller claimed he wrote it while serving time in jail for alimony – which is probably just one of his many jokes, but it stuck to the legend. Over the years it’s been recorded by Louis Armstrong, Billie Holiday, and even Ray Charles, proving how timeless this piece of jazz history is.