Oooh...I remember watching the music video for this one by 80s/90s aidoru Hikaru Nishida（西田ひかる）; one scene, I believe had Hikaru with a flower in her mouth or something esoteric like that.
In any case, this is "Jinsei Kaechau Natsu kamo ne" (This is the Summer that Your Life May Change), Nishida's 17th single from March 1995. With that summery theme and some of that zesty Latin in there, you would be forgiven if you thought that this song was something whipped up by Maki Ohguro（大黒摩季）who seemed to have cornered the market on such music back in that decade. But actually, this was written by veteran Reiko Yukawa（湯川れい子）and composed by Ichiro Hada（羽田一郎）.
But of course, when you think summer, you think beer! And sure enough, "Jinsei Kaechau Natsu kamo ne" was used as the campaign song for one of Asahi Beer's brands at the time. Despite how she looked back then, she was most definitely of age to drink the golden brew when the commercial was shot. The song itself got as high as No. 18 on the charts.