Ah! Ah! Ah! Ah! Stayin' popular ever since the classic, Grammy Award-winning disco anthem fronted 1977's "Saturday Night Fever," this Bee Gees hit has secured a place in the popular imagination. This installment from the "Impact: Songs That Changed the World" series provides a retrospective examination of the tune music fans have boogied to for decades. 36 min. Soundtrack: English Dolby Digital stereo.