Which song by the rock trip A-Ha was a hit in the United States in 1984?

Explanation

A-Ha was a Norwegian rock trio formed in 1983 by Pål Waaktar, Mange Furuholmen and Morten Harket. They are known for their new wave, alternative rock and synthpop sound. Their single "Take On Me" was a hit in the United States in 1984. Their releases include the highly succesful debut album "Hunting High and Low" (1985), "I've Been Losing You" (1986), "Stay On These Roads" (1987) and "East Of the Sun West Of The Moon" (1990). The band dissolved in 2010.