Cupid peaked at No. 1 on Billboard's Global (excluding the US), up one spot from the previous week.
It is the third time a K-pop group has topped this chart, following BTS and Blackpink.
"Fifty Fifty became the first girl group in the world to debut at No. 1 on this chart," said agency Attrakt. On the Global 200, they ranked second, up one spot from the previous week.
BTS' Suga's first official solo album, "D-DAY," debuted at No. 51 on the Billboard 200, the Billboard's main album chart, for the fourth consecutive week.