British pop star Jessie J has apologised to fans after Internet pranksters hacked into her official website and posted a crude message about Lady GaGa.

The Price Tag hitmaker was left fuming when her website was illegally accessed on Saturday (30Mar13), with jokers posting a rude note about her record label and the pop superstar in the news section.

The message, which has since been removed, read: "The whole Universal Republic (Universal Music) can suck Lady Gaga's d**k."

Jessie J has now issued an official apology to fans who were offended by the post.

In a message on her page, she writes, "Somebody has hacked my website...! How original! *Naaaat* (not) we are having it sorted Asap and my apologies for the rude message the hackers have left!"