Conversation so far:
What was Girls' Generation's Lion Heart?
Lion Heart is the fifth Korean language studio album recorded by Girls' Generation.
Was Girls' Generation's Lion Heart a hit album?
Girl's Generation's Lion Heart experienced commercial acclaim in South Korea, staying atop the Gaon Album Chart for two weeks and becoming the 13th best-selling album of 2015 .

Question: Did they producuce any singles or just albums?
Self-contained rewrite: Did Girls' Generation's producuce any singles or just albums?