According to this guy (who works at a PR company connected to Soundscan)
Cheek2Cheek is coming out September 22nd. He mentions clearly UK but if they wanna be in time for Grammys it could be a global release?
Tweet:
Lady Gaga/Tony Bennett, Jackie Evancho, Ella Henderson, Erasure, Professor Green release on the 22nd Of September in the UK
https://twitter.com/salesmoss/status/490466646700879872
