Yeah, according to
this website, Beyoncé has had emails hacked, too.
I highly doubt that Adele or Beyoncé would put anything like sound files for new tracks in emails, though. I can't imagine they could have that much in their emails that would concern Sony if it leaked. It's also possible they're bluffing. Adele, Beyoncé, and One Direction are Sony's biggest artists. I hope if anything leaks, though, it's potential release dates for Adele's new single. I don't want anything huge to leak like the new album, though. She doesn't deserve that. She's worked so hard on it and even though I desperately want it, I want it to be released on her terms, when she thinks it's good and ready for the world to hear.