For those who love Abba (and if you"re reading this, chances are you do, even if you don"t know it yet), Abba: The Definitive Collection represents a happy, joyous compilation of the Swedish supergroup"s numerous videos. Granted, they all seem to have been filmed on the same soundstage (even the firelit "Fernando"), but they retain their appeal and infectious charm. Fans can thrill to these vintage clips, which provide an opportunity to rediscover who was the most natural in front of the camera (Agnetha), who was the best dancer (Anna-Frid, a.k.a. Frida), who was the most demure (Benny), and who was the worst lip-syncher (Bjorn always Bjorn). Lasse Hallstrom, later an Oscar®-nominated filmmaker, directed most of the early videos, and it shows in their natural, no-fuss style; it wasn"t until Abba tried to make the jump to "80s-style electronica that they faltered in both style and content. In addition to old standbys like "Waterloo" and "Take a Chance on Me," don"t pass up the...