"X Factor" judge Sharon Osbourne's and Lady Gaga's reconciliation hug may have shocked the "X Factor" viewers but what is more shocking is daughter and "Fashion Police" host Kelly Osbourne's reaction to it.

Singer Lady Gaga arrives at Berghain nightclub to promote her latest album 'Artpop' in Berlin October 24, 2013. The album will be released in Germany on November 8. REUTERS/Tobias Schwarz

The long running feud between the Lady Gaga and Sharon Osbourne came to an end before the results show of "X Factor" as Gaga performed two tracks from her new album "ARTPOP" on Sunday night episode of "X Factor." Sharon Osbourne the judge of the show lauded Gaga's performance followed by a big hug that left everyone in shock.

Also, they had to share the VIP area at the legendary London nightclub where Gaga decided to give an impromptu performance of her new song "Venus."

Osbourne was there to support "X Factor's" Shelley Smith. "Sharon and Gaga spent time together backstage. They sat talking for a while. They were happy to share the space before having a private conversation. They are both amazing women and both about "love" at the end of the day. There were no hard feelings," revealed an insider.

Unfortunately, daughter Kelly Osbourne is not quite happy with Lady Gaga's and mum Sharon Osbourne's settlement and she refuses to let go. She took to twitter to express her thoughts about it.

The Feud Between X Factor Judge, Her Daughter and Lady Gaga

The feud dates back to Grammys 2009 when Kelly Osbourne criticized her for disrespecting her fans by skipping the Grammys. The row was further heated up when Kelly suggested that Lady Gaga was trying to conceal her pregnancy by wearing Burkha style outfit. And then she claimed that Gaga led her "Little Monsters" wage a hatred campaign and abuse Kelly through social media networks.

Kelly Osbourne's reaction

On the night when Kelly Osbourne was celebrating her 29th birthday, Lady Gaga sent her a cake to initiate peace and harmony between both. But Kelly got even more furious with this act.

"Not to be ungrateful but why would you send me a birthday cake via my MOTHER in a country half the world away? #JustSendItToME #LoveNotWar," Kelly wrote on twitter.

She went a step ahead and posted a picture of the cake along with a note saying "Eat my s**t" and "Hypocrisy."

The feud continued as Gaga responded to her telling her she did not know about her birthday and she meant peace with this gesture.

But the feud doesn't seem to get over soon. Meanwhile "X Factor" judge Sharon Osbourne decides to stay out of the perpetual dispute between Lady Gaga and her daughter Kelly Osbourne.