Kuu's own words on why:
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GC: The title of your album released this month is “Dejavu”. Why did you choose that title?
KK: I decided upon the name because the album is full of original songs that have a familiar feel to them. The phrase is in French, and a friend told me that for her, ‘deja vu is when even though there’s been pain in the past, there still exists pain that must be overcome’. So after playing back the album, the name seemed to fit.
source:
http://www.tokyohive.com/2011/03/kod...and-hall-live/
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imo I did get the familar vibe from this album but like a better quality of her past albums and hits, I dunno but the album cover was like a homage to the feeling of wanting to go back with all the clocks and fairytale things