number 1 on 2 April, a position it held for six weeks. In total, the record stayed on Tio i Topp for 14 weeks, their most successful single on that chart. After being played repeatedly on Radio Luxembourg, the single gained traction in the Netherlands almost two years later. For most international releases outside of the Nordic countries, they were issued by Decca Records, but with few exceptions as they were issued by Olga in the Netherlands. In the Netherlands, the single was backed by "No Response". The single entered the charts on 13 July 1968 at a position of number 18. The following week, it had reached number 14. On 27 July, it had reached the top-10 for the first time at number 8. The following week, it entered the top-5 for the first time and reached its peak of number 4, a position which it held for two weeks. On 17 August, the single had exited the top-5 at number 10, a position it also held for two weeks. The single was last seen on 31 August at number 17 before exiting the chart. In total, it spent 8 weeks on the chart, of which 5 were in the top-10 and two were in the top-5. "Sunny Girl" became the Hep Stars only successful release outside the Nordic countries, as clashes between Olga Records and Decca Records hindered virtually any records to be released outside of the Nordics, successfully terminating their international career. The single was also hugely successful on Norway's chart, VG-lista, and became their first charting single on there since "Bald Headed Woman" The single entered the chart at number 9 on 16 April 1966. The following week, it had reached number 8, a position it held for two weeks. On 7 May that year, it had climbed to number 6, and by the following week it had entered the top-5 for the first time, at its peak of number 4. The following week it ascended to number 5, before once again reaching number 4 on 28 May that year. The week after it ascended to number 6, a position it held for two weeks, and was last seen on the chart on 18 June that year at a position of number 7. In total, the single spent ten weeks on the chart, of which all were in the top-10 and three were in the top-5.