Song: "O Let's Do It" (2009)
Album: Flockaveli

Forget complexity, or intricacy, or perfectly assembled verbiage. Some of rap's most memorable moments are just cadence, nothing more. For the stop-start production of Waka's "O Let's Do It," his opening lines hit on an unforgettable pattern, with a simple message—some shit went down with his cash, and he can't buy more to sell more—and the rest (read: a rapper known for a distinct cadence before anything else) was history.