On her official Facebook page she said the leak was "not how I wanted to present my new songs", but that she appreciates the "positive response" from her fans.
She goes on: "When I record music I always think about my fans singing every note and dancing to every beat. I make music to make people happy and I appreciate that everyone has been so anxious to hear my new songs."
Her "appreciation" initially led to a number of cease and desist orders being sent to music blogs hosting the first track to leak, before the album leaked in full on Tuesday night.
It's not yet known if the official release date for '4' — currently set at June 27 — will be brought forward.