The U.K.'s Now series features timely selections of pop hits and provides a convenient way for casual pop fans to stay on top of the most popular singles. The sets are almost always naturally well-rounded, encompassing dance music, R&B, hip-hop, teen pop, and rock. And though they might expire, in a sense, since they're based on trends in pop music, they work as more than adequate snapshots of specific points in time. The 50th volume, released in 2001, includes Bob the Builder's "Mambo No. 5," Nelly Furtado's "Turn Off the Light," the Dandy Warhols' "Bohemian Like You," Emma Bunton's "Take My Breath Away," Mary J. Blige's "Family Affair," and Victoria Beckham's "Not Such an Innocent Girl."