Sheryl Crow's biggest hits are sun-dappled odes to having fun, but her deeper cuts show off her range. “Love Is a Good Thing” and “Gasoline” are pointed protests disguised as late-in-the-day jam sessions. “Collide” has her trading slightly wary glances with Kid Rock. And her tribute to Michael Jackson reveals where at least some of her well-honed pop instincts came from.