^^ loving the Madonna/goldfrapp action idea.
Madonna & Beth Ditto.....MUST HAPPEN!!! Beth said that is a dream to do, Madonna is a fan of gossip...i say...Seary get on the phone for album 13

(and reunite with P.Leonard too and get Jamie XX and Avicii lined up too....sweet!)
Spears N Minogue......get the Pop Princesses together to make a massive euphoric Pop Dance anthem! Bloodshy & Avant...PEN IT!!!
Bjork and Kate Bush.....would the universe combust unto itself and transform into a new one??? most likely if they teamed up!! :-O.....only one way to find out
Christina Aguilera and Bruce Springsteen...oh my lordy could you imagine it? Most likely will never happen but i reckon some mighty ROck influence with a Pop twist could make it truly something...a LOUD, BRASH version of Robert Plant and Alison Krauss
grace jones AND yoko ono......avant-garde has never been so avant-garde!! Reggae/Dub meets Dream Pop meets....YOKO!!!! it would be so absurdly awesome! OR just absurd but either way....
Cyndi Lauper and Azealia Banks....just now hit me in my mind...i think it would definitely work...Azealia has a real kookiness and massive musical influence...Cyndi is known for being musically passionate AND kooky

so something a bit Retro Pop meets 90s Ambience sounds could really edge it and bring the best in both of these ladies...it would work!