Rather late on this news, but it has been confirmed that La Pompon, an up-and-coming dancing and singing girl group consisting of six members, will be performing Detective Conan's 41st opening theme, "Nazo". This will be a cover of Detective Conan's 3rd opening by the same name, originally sung by Miho Komatsu. The six members from oldest to youngest are as follows: Misaki, Yukino, Rima, Hina, Kiri, and Karen. The girls range from ages 14-18, and released their first two singles, BUMP! and HOT GIRLS, earlier this year. Fun fact: the girls wear consistently color-coded clothing in order to be easily identifiable. Misaki is purple, Yukino is green, Rima is blue, Hina is red, Kiri is yellow, and Karen is pink. The opening will air on September 5th with episode 790 of Detective Conan and the full song will be released at a later date of September 16th.
Link to their YouTube channel.
Link to the original 3rd opening version of the song, for Tequila love and nostalgia overload.