Let me explain you what I think she is doing: This is my interpretation of Lady Gaga’s performance in Berlin.
Standing over the scattered pieces of the Berlin Wall she wanted to tell us that WE COULD BELONG TOGETHER. The Wall of Shame was no more than a boundary, one of all the boundaries that existed and still exists. Let’s just overthrow them. We can be limitless. WE COULD, WE COULD BELONG TOGETHER. Maybe her dream will come true, “and ART and POP can belong too”.
for me this even evokes some marry the night themes. her outfit is reminiscent of a transformed wedding dress. perhaps it could be said in this sense that she is marrying the 'dark past' represented by the wall?
Yes its the Abramovich method , its about a personal experience through iconography and concentration and this place represents a lot of what Gaga stands for : Peace , equality and change.