Carly will END ME if she releases something like "Dancing Queen". She needs to work with Giorgio Moroder!
She should work with Giorgio, yeah. I think at this point the best producers would be:
Erik Lidbom (J-Pop)
Yasukata Nakata (Electronic & J-Pop)
Giorgio Morder (Disco)
+ those from the last era (pop perfection)
Carly should make a collab with Tommy february6 (the artist who started the 80s music trend) and release it as a single in Japan. Their voices would fit so well, they're both into retro music and it would help Carly to build her image in Japan.