I've got some news concerning her next album. In September Lily said that the album is "very close to being finished" and that it will be released next year. The release was postponed, because she wanted to be there for her children when school started. However, she allegedly stated that she might release the lead-single of the new album this year in December.
In my opinion the title 'The Fourth Wall' is pretty much confirmed. It is used everywhere on the internet, even by Lily herself.
You can also find more snippets of new songs on the internet, but it hasn't been confirmed if those snippets are from songs that will be on the next album.