Liu Yiqian and his wife, Wang Wei, will charge Modigliani's "Reclining Nude" to an AmEx "black card."
The money raised will go to a charity that helps disabled people participate in sports.
Six and a half months after he auctioned it off for $4.7 million, Watson got his prize back.
Auction house sells more than $1 billion in art in single week, including a $179.4 million Picasso and a $56.2 million Warhol.
The auction best represents the famed actress's love of art, particularly the sculptor Henry Moore.
The same auction house this week pulled a Hitler painting after questions about its authenticity.
The "Gucci addict" is taking a step toward recovery by putting around 150 items on the virtual auction block.
An original ink drawing by E.H. Shepard sold at auction in London for nearly $500,000.
One of the scientists who discovered DNA's double helix structure auctioned off his 1962 prize Thursday.
A scene depicting an old town hall believed to be by the Nazi dictator sold at auction Saturday in Nuremberg.
A Bonhams auction of science objects put items like an Apple-1 computer, a Manhattan Project viewing window and a letter by Charles Darwin on the block