Kenny Loggins shaped ‘70s pop by cowriting the yacht-rock classic “What a Fool Believes,” while anthems like the desperation-tinged “I'm Free” and the charging “Nobody's Fool” jolt some of the ‘80s' biggest movies. His pop experimentation reached its peak on 1985's manic “Vox Humana,” which features fellow soundtrack fixtures The Pointer Sisters on claustrophobic, surround-sound-minded backing vocals.