KELLY OSBOURNE AND LADY GAGA AGAIN,TELLS GAGA "EAT My S***"AFTER SENDING HER BIRTHDAY CAKE.

It looks like Kelly Osbourne does not want a slice of Lady Gaga's cake. The stylish E! staple is simply fuming after the "Applause" singer presented her with a sweet peace offering-- received indirectly through the birthday girl's celebrity  mom,Sharon Osbourne.

Gaga, 27, made an appearance Sunday, Oct. 27 on The X Factor UK, where she presented judge Sharon Osbourne with a cake to celebrate daughter Kelly's 29th birthday, which falls on that same day. The gesture, however, was sorely received. "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 retorted on Twitter to her 3 million plus followers. Osbourne then posted a photo of the cake to her Instagram with the hashtags #EatMySh-t #Hypocrisy."

Gaga, in response to Kelly, tweeted her directly, “I didn’t know it was your B-day until this afternoon. Meant as a peace offering. Happy Birthday.” With it, the "Do What You Want" crooner attached an image of her holding the offending confection with Kelly's mum, 61. Kelly's scatological response then sparked Gaga's monsters to unleash their fury on the birthday girl, which lead the artist to plead, "Monsters, please just focus on the positive of tonight's performance and do not send any hateful messages. I don't support it. #SpreadLove."

Minutes later, Kelly sniped, "#StefaniStopIt!" and "I live for a #Cause not for the #Applause!!!!!!!" (Gaga's name is Stefani Germanotta.)

This is not Lady Gaga and Kelly Osbourne's first public spat. Their ongoing feud actually dates back to 2009 to when Osbourne called Gaga a "butterface." The comment moved Gaga's fans to respond with some vile suggestions for the television host. "They've said I should kill myself, that they hoped I get raped. I mean it's crazy but I've had this all my life and I just try and ignore it," said Osbourne to British publication, Fabulous, in its January issue on Gaga's monsters commenting on her weight and image.