Donna Summer was rightfully crowned the Queen of Disco in the late ‘70s and early ‘80s, but she always showed an impressive range well beyond her dance-floor staples. “He's a Rebel” nods to Spector-influenced pop with its sleek rock sounds, while bubbly synths add an effervescence to “Stop Look and Listen” and a silky atmosphere to “Fascination.” Summer's theatrical past even shines through on her German reading of “Aquarius.”