Conversation so far:
What was Oppa Oppa?
Oppa, Oppa is a digital single by Super Junior sub-group, Donghae&Eunhyuk.
When was Oppa Oppa released?
Oppa Oppa was released on-line on 16 December 2011 by SM Entertainment and distributed by KMP Holdings.

Question: How did it do on the charts?
Self-contained rewrite: How did Oppa Oppa do on the charts?