Is Diane Sawyer headed to 'Glee'?

Now that Katie Couric has had her star turn on "Glee," Matthew Morrison revealed on the Grammys red carpet that Diane Sawyer could also make an appearance.

"I think it might happen," Morrison admitted. "I don’t know what the context is going to be, but I hear there’s a Diane Sawyer/Sue Sylvester war going on on Twitter."

Morrison for one is hoping for it. "I love Diane Sawyer," he said. "It's a real possibility that she'll be on the show."

But Morrison has been making some 'Glee'-ful noises off the set as well. The actor plays the vocally talented Mr. Schuester on the Fox show, and he's also showing off his pipes with an upcoming album.

"Album should be out in May," he told E! on the Grammys red carpet, and added that you can "expect a single over the next three weeks."