WICKED is the backstory of the Wicked Witch of the West and Glinda the Good, Their relationship begins at Shiz University where they are roommates. The story takes you from before you meet them in The Wizard of OZ  and after. 

enjoy a video of the original cast (Idina Menzel) Elphaba and (Kristen Chenoweth) Glinda singing Defying Gravity at the Tony Awards (June 2004)