[1] When the song was re-released through Astralwerks and Universal in February 2020, it started gaining popularity through user-generated clips on the app TikTok.
It further reached the top 10 in Austria, Germany, the Netherlands, Slovakia and Switzerland, as well as the top 40 in Australia, Belgium (Flanders and Wallonia), the Czech Republic, Denmark, Estonia, France, Ireland, Lithuania, New Zealand, and Norway.
[2] ILY is a remix of a cover of the chorus from the Frankie Valli song, "Can't Take My Eyes Off You".
Mike Wass of Idolator described the song as a "chorus on a loop over a dreamy synth-scape that falls somewhere between Petit Biscuit and Kasbo" and praised it as "the perfect soundtrack to any blissed-out moment".
[3] Hits Daily Double called the song "the heating-up club banger" version of the original.