Kelly Osbourne wants to end her feud with Lady Gaga "like adults."

The Fashion Police host has reached out to the "Applause" hitmaker to apologize for acting "like a child" when the singer gave her mother Sharon Osbourne - who is a judge on the UK version of The X Factor - a birthday cake to pass on to Kelly, who turned 29 on Sunday. Gaga posed with Sharon and the cake after performing at London nightclub G-A-Y on Saturday and though Kelly - who lives in Los Angeles - suggested the gesture was a "publicity stunt," she is now keen to move on.

"@ladygaga I acted like a child last night. Just not into publicity stunts call me & we will end this like adults I dont want 2 fight anymore [sic]," Kelly posted in a post on her Twitter account. Gaga has not yet responded to the message.

Perhaps Kelly agreed to forgive and forget after Sharon - who hugged Gaga following her performance on The X Factor on Sunday night - appeared to do the same. Sharon tweeted on Sunday, "Blown away by Lady Gaga's performance and graciousness."

After hearing about the cake, Kelly flew into a rage posting a series of angry tweets which read, "Not to be ungrateful but why would you send me a birthday cake via my MOTHER in a country half the would away? #JustSendItToME #LoveNotWar #EatMyShit #Hypocrisy / #StefaniStopIt! / You are so far behind you think you are first! / I live for a #Cause not for the #Applause!!!!!!! I like desert, but i prefer the truth... it's sweeter / 'Let them eat cake' #MarieAntoinette [sic]."

The Osbournes have been locked in a bitter feud with Gaga for months, with Sharon branding the "Alejandro" hitmaker - whose Born This Way Foundation campaigns against bullying - a "publicity-seeking hypocrite" for letting her fans send threatening messages to her daughter Kelly after she criticized Gaga's 2012 Grammy Awards outfit. Sharon joined the feud after Kelly was inundated with abuse from Gaga's fans online.