I think Angel Down is the best ballad on the album, it's so anthemic and I can imagine her closing the Super Bowl with it. But there probably won't be another ballad single, so after Million Reasons either Hey Girl or Diamond Heart are the best options
Million Reasons has played in two of the most watched TV shows here and it's the one I've heard on radio, not A-yo. I think the A-yo (US), Million Reasons (EU) theory might be right.
no. they may not be some super relevant platform, but it always gets covered in the news etc, and the '...Lady Gaga slayed with her vocals' exposure won't hurt.