Britney Spears has slammed the Osbournes as the "most boring family known to mankind", as she defended Kate Beckinsale against "incredibly cruel people".

The 'Toxic' singer hit back at the famous family after patriarch Ozzy Osbourne admitted he was "fed up" of watching her Instagram dancing videos "every day", but Britney has now told the reality TV stars to "f*** off".

In part of a lengthy Instagram message, which also saw her defend actress Kate against social media trolls, the 42-year-old pop star wrote: “I’m gonna do a photoshoot with Kate [Beckinsale] and tell the Osbourne family who is the most boring family known to mankind to kindly f*** off !!! (sic)"

It comes after Ozzy's made his comments on the family's 'The Osbournes podcast', after which his son, Jack Osbourne, added: "Save Britney."

Ozzy then said: "It's sad. Very, very sad," and his wife Sharon Osbourne added: "It's heart-breaking."

Britney - who was previously in a controversial 13-year conservatorship, which left her life and financial affairs and decisions in the hands of her father before it was ended in November 2021 - began her latest Instagram post by defending British actress Kate, 50, because she believes it is "important to help each other" in life.

She wrote: "Have you guys seen the movie Serendipity with Kate Beckinsale? Well let me tell you ... if you haven't you definitely should!!!

"I adore Kate Beckinsale especially because she's from London!!! I realized how incredibly cruel people were talking about her IG saying she needs more age appropriate content ... she's in her fifties and I thought it was pretty bad*** how she responded with a mini bow in her hair looking literally 4 years old!!!

"Not as bad as some of my comments saying it’s sad that I’m as old as I am and I’m dancing every single day on my IG !!! Number 1) I hardly ever dance … and number 2) I’m not poor at all !!! I have more ligature in my left toe than any grown man or woman on earth !!!

"If you don’t believe me... how long do you think I should keep this going for ??? In my transparent opinion, wealth and health it isn’t relied solely on cash in your bank account which I have lots of that too... it relies on my quest in my own f****** Interest in how I demonstrate and serve back these wise ass a******* just as Kate did !!! I taught dance class last week to a couple of teenagers … a lot of the kids were too thin and some were too big.

"I know what it’s like to be judged so it’s a ridiculous and stupid subject initially but I think it’s important to HELP EACH OTHER and invite each other to places that help our souls grow !!! It’s good to see others doing painting class... dance class ... what have you seen lately???

"What are you gonna do to help someone out and bring their dreams to life besides being like me and Kate’s haters saying we’re too old or don’t have appropriate content ??? Do you think perhaps they might be offended by what they see ??? Would a condescending approach be better like inviting those exact people to my class and let them see how my students are nourishing and living THEIR LIVES !!!???

"It’s good for the soul yet frankly it’s not condescending AT ALL it’s BEING ..... a Smart ass and damn those are usually pretty attractive !!! On the flip side, there are actually people that do help others out and mean well that don’t embarrass or demoralize another !!! I personally believe that being vulnerable enough to ask someone for inspiration or help is incredibly beautiful ... but ironically in the world we live in with how incredibly cruel people can be you have to be extremely careful who you allow in your circle and your heart !!! I’m gonna do a photoshoot with Kate and tell the Osbourne family who is the most boring family known to mankind to kindly f*** off !! (sic)"