Kelly Osbourne thinks it is ''insane'' someone has paid $20,000 to have dinner with her family.

The showbiz clan - rocker Ozzy Osbourne, his wife Sharon and their children Jack and Kelly - donated a family meal for an auction at the Race to Erase MS gala event at the weekend, and the 'Fashion Police' host can't believe how much their lot raised for the multiple sclerosis (MS) charity.

Kelly wrote on her blog: ''Can you believe that someone bid $20,000 to have dinner with my family???? That's insane but thank you thank you thank you whomever you are, I can't wait to have dinner with you!!!!! It's going to be a fun one so get prepared... YOU HAVE BEEN WARNED!!!! (sic)''

Kelly herself also got involved with the auction, winning a bidding war against her brother - who suffers from MS - for a vacation in Mexico, for which she paid $6,000.

A bespoke Aston Martin Vanquish - which was commissioned by the Osbourne family - attracted the highest bid of the night, selling for $230,000.

As well as the auction, which was hosted by Jack and Howie Mandel, guests at the Hyatt Regency Century Plaza hotel in Los Angeles were entertained with performances by Steven Tyler, Cee Lo Green and Natalie Cole, while Jordin Sparks was among the speakers.

The annual event raised $1.75 million dollars for Race to Erase MS and its Center Without Walls programme, a collaboration of top MS research centres working together as a team on ground-breaking research to treat and ultimately find a cure for the disease.