Question: The Weather Girls is an American musical duo, the duo reached their peak in popularity in which year, with the international hit "It's Raining Men"?
Sentence (from "The Weather Girls"): Formed in San Francisco, California in 1977 as Two Tons O' Fun, the duo, consisting of singers Izora Armstead and Martha Wash, originally served as Sylvester's backup singers.
Relevant evidence: No