Abba's first-ever #1 single was "He Is Your Brother". It reached
#1 on the Swedish radio play chart in 1972.
The first Abba single to reach number 1 outside Sweden was "Ring
Ring" (1973), which hit #1 in Belgium.
"Waterloo" was Abba's third chart-topper and the first to reach
#1 in an English-speaking country.