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1 October 2012, 16:54
The 'LaserLight' singer says the singer is a "huge inspiration" to many, regardless of her weight.
The 'Domino' star says she has been "disgusted" be recent press speculation about the singer's body, after Gaga spoke out last month about her weight gain while out on tour.
"I must say I am disgusted at some of the articles I have read about @ladygaga in the UK press recently," Jessie J tweeted on Sunday evening (30th September). "So sad that they can't just support consistently.
"She looks great and is a HUGE inspiration to so many."
Jessie J's tweet in support of the 'Born This Way' star has already received over 3000 retweets since being posted less than 24 hours ago.
Check out a picture of Jessie J at a signing for her new autobiography Nice To Meet You below (Credit: PA):
Lady Gaga was the subject of widespread reports about her body in late September, later revealing she had put on "25 pounds" during the 'Born This Way Ball' over the summer.
Lady Gaga will continue her tour with a show in Milan, Italy tomorrow (2nd October) before heading on to Nice, France later this week.