5. "Diamonds" (2012)
Rihanna's greatest attribute has long been her adaptability: She can swagger and belt her way through any EDM, R&B or rap song while making it entirely her own. After a series of club hits, she switched gears with this luscious, opulent Sia-penned power ballad. On the track, which would become her 12th Number One, Rih showed off her often underrated vocal abilities that had frequently been overpowered by booming, ornate EDM production. "Diamonds" still stands as one of her most stirring and uplifting hits.