became the initial single release, and is probably the most well-known rendition of the song. A second single version was recorded on December 30, 1964 along with their second single "I Should Be Glad". This version was first issued in January 1965, when the single was re-pressed due to the massive success it achieved. The third and final version was recorded somewhere between 5–6 October 1965, almost a year after the original version was released. This version was included on their debut album. Release "Sleep Little Girl" was initially released on 16 October 1964 by Platina Records with the catalogue number PA 102. It was the second release on Platina, after Glenn Jones "About Rita". The B-side of the song was "Tell Me You're Mine", which was written by lead guitarist Anders Töpel and bass guitarist Göran Lagerberg, and is sung by Lagerberg. "Tell Me You're Mine" was later also re-recorded by the band later, most likely at the 30 December 1964 session. The initial version of the song is less refined due to the unideal recording studio, and lacks the bass breaks which occurs on the later version. This version was only issued as the B-side of the 1964 release of the single, while the second version substituted it for the re-release in January 1965. This version has never received an official digital release, and remains among the rarer tracks recorded by Tages. The song first entered Kvällstoppen on the 1st of December 1964 at a position of number 11. The following week, it had breached the top-5 for the first time, at a position of number 4. It reached its peak on the 15th of December at a position of number 3, where it stayed for one week. The following week it had once again ascended to number 4, where it stayed for four weeks. On the 19th of January 1965 it had once again ascended to number 5, where it stayed for two weeks. Following this, it exited the top-5 at number 8, a position it held for two weeks. On the 16th of February, it had exited the top-10 at number 12 and the week after that it was at number 16. On the 2nd of March it was at number 19 and was last seen the following week, at number 20, before dropping off. In total, the single spent fifteen weeks on the chart, ten