Lola is the "gossip queen" of Metropolis who acknowledges to her colleagues that "giving away secrets is my bread and butter" (S No. 285/1, Mar 1975: "Search for the Impossible Man").
Clark first encounters Lola in May 1974 when she purports to reveal Superman's secret identity (S No. 275/1: "The Dragonfly Invasion of Metropolis!").