I can imagine the legendary duo of Pink Lady being compared to the late and just-as-legendary James Brown. Mie and Kei were probably the hardest-working ladies in Japanese show business at their peak with all that choreography done over and over again on whichever show or concert stage they appeared on. Whether it be "UFO" or "Southpaw", they could've started their own exercise regimen...and been darn successful at it.
However, it's this song, "Chameleon Army" that apparently had Pink Lady REALLY kicking it up to high gear. According to J-Wiki, of all of their songs, this is the one that had the largest number of moves. And watching the videos above and below, I can see it. I lost a kilogram just watching it. And strangely enough, it's the one song that I don't really remember all that well compared to the other hits. Written and composed by their regular songwriting duo of Yu Aku (阿久悠）and Shunichi Togura(都倉俊一）, the lyrics are about the girls threatening to unleash hell via a massive group of colourful reptiles if the listener is not good. Considering how much the Japanese love their animals, I frankly think it's the chameleons that should be afraid. Musically, I think it's probably the most disco song that I've heard by them so far.
I bow to their amazing endurance and strength! It was also mentioned in the J-Wiki article about the song that because of the frantic complexity of the moves, mistakes did happen a fair bit during the live performances, but I think the above videos had them on their "A"game.
Released in December 1978, "Chameleon Army" is notable for being a song that actually started out way down in the Oricon pack at No. 88, only to warp up to No. 1 a week later, where it would stay for over a month (the record has been since superseded by the group SPEED with "All My True Love" in 1998). It is also notable for the fact that their 10th single would become their final No. 1 tune although Pink Lady was only halfway through their history of 22 singles. But what a way to end their run of No. 1s! The single, by the way, would end up as the 10th-ranked single of 1979. It also sold 700,000 records according to Oricon, but the issuing studio of Victor boasted a much higher total of 1.25 million; of course, it would. And the final point is that "Chameleon Army" charted for a grand total of 63 weeks...that record has yet to be broken.
Apparently, 90s duo Puffy did their tribute to the song but unfortunately, I couldn't find a video of their cover.