Conversation so far:
What did Lorde do in 2016?
In January 2016, Lorde purchased a $2.84 million home in Herne Bay, Auckland.
Is she still working on music?
Lorde revealed the title of her second album, Melodrama on 2 March.
She released a new song from the album titled "Liability" on 9 March 2017.
Did this song go high on charts?
CANNOTANSWER.
Did she have any drama or controversy?
CANNOTANSWER.

Question: What is Melodrama?
Self-contained rewrite: When did Lorde reveal her second album Melodrama?