Dido has always been a bigger star in the United Kingdom and continental Europe than she has in the United States. But as this Greatest Hits collection demonstrates, she has churned out a long list of smoothly seductive pop tunes since the late '90s. Her style -- alluring downtempo beats meet Sinead O'Connor-like balladry -- is simple yet effective. This is especially true of her calling-card numbers "Here With Me," "White Flag" and "Thank You." The deluxe edition contains a second disc of remixes and radio edits, including a Mantronix remix of "Go Dreaming" that's very clubby and very cool.