As Glee fans know, there's a loooooong wait until new episodes air in April.

Fortunately, we have exciting guest-starring news (Olivia Newton-John!) and set list news (Madonna!) to tide us over until then.

We also have these quotes, scoops and spoilers, courtesy of Michael Ausiello's latest mailbag:

• Jenna Ushkowitz says there's more drama ahead for her character: “You will definitely see more conflict between Artie and Tina."
• The show has sent out a casting notice for a pair of African-American infant twins.
• Jessalyn Gilsig's Terri will try to be redeemed: “I think I will be singing and dancing [this season],” the actress said. “I don’t know if I’ll do them at the same time. I think a song makes everybody forgiving - that and a sister with special needs."

They won Sectionals... but what's ahead for New Directions?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.