A watershed '90s release, Screamadelica was the most convincing marriage of overground rock and underground dance music yet. With one foot in Beggars Banquet-era Stones (the gospel-rock "Movin' on Up") and the other in the trippy soundscapes of rave culture (the Orb-produced "Higher Than the Sun"), Primal Scream caught the mind-blown euphoria of Ecstacy better than anyone. Frontman Bobby Gillespie had no singing voice to speak of, but his vision of cosmic hedonism made him a drugged-out Pied Piper for the acid tribes. From the incantatory anthems "Loaded" and "Come Together" to the sinister rendering of the 13th Floor Elevators' "Slip Inside This House," Screamadelica was a modern psych classic. --Barney Hoskyns