The 'Nobody's Perfect' singer admitted on Twitter to being upset by the premature release of her 'personal art'.
The 23-year-old began by retweeting a post from fan group Team Heartbeats, which said: "Seriously whoever keeps leaking some songs from @jessiejofficial new album needs to stop? Yes they are amazing but What's the point! Have patients (sic)...#dumbasses."
Jessie J proceeded to share her own thoughts on the issue, declaring: "Its a real shame when people feel they have the right to leak an artist songs. Its art and personal... #notcool."
When asked by a follower if she had an idea of who was behind the leaks, she replied: "I will never know. Could be anyone from a hacker to someone who has been sent the song once upon a time #Sad
"Fluff it!! Imma just keep writing!! Keep believing and keep working my ass off!! :) yeaaahh man!!"
Jessie J announced last month that 'Who's Laughing Now' will serve as the fourth single from her debut LP Who You Are.
She has also teased that her next album will not "sound the same" as its predecessor and could consist of acoustic tracks.
Jessie J will kick off her first UK tour on November 17 at Birmingham's 02 Academy.
Watch the official video for Jessie J's 'Nobody's Perfect' below.