EW has learned that Madonna has given Glee the rights to her catalog and that an all-Madonna-music episode is in the works for early next year. The hit series has been building an audience and filling the iTunes charts with its cover songs, and Madonna's involvement is a testament to how big the show is getting. Also, an amazing Glee cover of a classic Madonna track has the potential to be even bigger than the show's blockbuster take on "Don't Stop Believin'." Quinn totally has to do "Papa Don't Preach." And I can completely see Rachel tackling "Material Girl."