I had this really elaborate dream that two of my high school friends brought me to a Madonna concert (in a school auditorium 

). We were in the second row. She kept interacting with the crowd and had us all singing along. 
Aretha Franklin appeared for a duet. 
Madonna dissed Gaga (of course). 
The really weird part was that sometimes my friends and I were ourselves, but sometimes we were Harry Potter, Hermione, and Ron. 
I was Harry Potter. I was gay Harry Potter. 
And Madonna tried to out me. 
I woke up before we got to the good stuff (Vogue, Prayer, Virgin, Justify, Holiday, etc). I remember her performing Hung Up and Keep It Together. Nothing else stands out in what I remember.