Conversation so far:
What music did the singer Kerli work on?
In 2006, Kerli worked on an autobiographical set of songs, the first set of which were released on a self-titled EP in 2007.
What was the name of Kerli's 2007 album/EP?
Kerli is the debut self-titled EP by Estonian singer-songwriter Kerli. It was released on October 16, 2007.

Question: What did Kerli release next?
Self-contained rewrite: What did Kerli release next after the album Kerli?