On August 11, 1961 RCA Victor released "His Latest Flame" / "Little Sister". On the 21st of the month Billboard listed "Little Sister" at number 61 of their "Hot 100". The song stayed on the chart for 13 weeks and peaked at number 5. The following week "His Latest Flame" appeared on the hitparade, too. Within its run of 11 weeks the song climbed from number 66 to number 4. On the "Adult Contemporary Chart" the track was even more successful. Here it also stayed for 11 weeks, but peaked at number 2. In 1992 the RIAA honored the domestic sales with a Gold Award. The single also sold well in Europe and Australia, in total the label was able to retail 3.25 million copies, which translates to 487.5 million paid streams. It proved to be a bad idea to release two strong tracks on a single record. At the time the charts were not just calculated by sales, but also by radio airplay and the opinion of the buyers (some were asked which song made them buy the single). Because both tracks were often played on the radio and the audience didn't name a clear favorite, both songs charted high, but none became a number one hit. On Spotify "His Latest Flame" was streamed around 50 million times. "Little Sister" is less popular, but still accumulates 30 million streams.

The sleeve was designed with a promo photo for "Flaming Star", which had been released the previous year by 20th Century Fox.

On the streaming platforms the single is not available, but both tracks can be found on the album "Elvis' Golden Records - Volume 3".

On June 25, 1961 Elvis recorded 12 takes at RCA Studio B in Nashville/Tennessee. Finally he selected the 8th attempt for release. A friend tells the narrator of his latest flame, a girl named Marie. Suddenly he realizes, that the lady is his own girlfriend and obviously isn't as faithful as expected. Even though the story is quite sad, the melody is happy and also Elvis' performance doesn't display even the slightest bit of anger or hurt. But that's the charme of "His Latest Flame". In 1963 the track was also released on "Elvis' Golden Records - Volume 3", in 1971 it was part of the boxed set "The Other Sides - Worldwide Gold Award Hits Volume 2". By the way: The song was written by Doc Pomus and Mort Shuman.

The duo also wrote "Little Sister" and it was recorded on June 25, 1961, too. Elvis taped 11 takes and approved the 4th one for release. The song is dominated by a (for the time) hard played electric guitar, but I still regard "Little Sister" to be a popsong rather than rock'n'roll or r&b. The studio recording later also appeared on the longplayer "Elvis' Golden Records - Volume 3" (1963) and the boxed set "Worldwide 50 Gold Award Hits - Volume 1". A live version can be found on "Elvis In Concert" (1977).