Can such a thread be complete without mentioning Eydie Gorme? "The Look Of Love"...
Donna Summer. Wonderful voice trapped in the sticky resin of 70s pop.
Honorable mention: the alto section if the Choeur de l'Orchestre de Paris. Barenboim conducts Stravinsky's "Symphony of Psalms", Erato CD featuring le Sacre du Printemps. Those alti, oooohhhh, they make my hindbrain's "Ice Cream, Yay!" receptors fire in volley.