Before revision:  In this paper we  show that there are exactly four non-circularizable arrangements of 5 pseudocircles , exactly one of them is intersecting. For n=6, we show that there are exactly three non-circularizable digon-free intersecting arrangements.
After revision:  In this paper we show that there are exactly four non-circularizable arrangements of 5 pseudocircles , exactly one of them was known before). We also show that exactly three out of the 2131 digon-free intersecting arrangements.