Well, according to Mirror.co.uk, she will be. But since the news was only given a passing mention in their blog article, no one (including BuddyTV) seems quite sure yet, and Gleetastic even claims that Zap2It is thinking it's nothing more than a rumor. I haven't quite decided yet how I feel about the possibility, though it might be interesting to see if she winds up just guest-starring or also sneaking in a song or two (Bleeding Love for Lea Michele / Rachel, anyone?).
What are your thoughts, guys? Would you be excited to see Leona Lewis on Glee, and what new character role might she play? Think it's more than just a rumor? I'll be on the look-out for more concrete news on this one, but in the meantime, let's discuss!