While making the leap from upstart teen-popper to revue-worthy icon, Britney Spears amassed a robust catalogue of playful, sexy tracks that reveal her range. Whether she's generating sparks with Rihanna on the spicy “S&M,” crushing on a bad boy on “Criminal,” or playing it super-sweet on the candy-coated “Ooh La La,” Britney can inhabit any pop idea while giving it an extra bit of superstar shine.