Star Jones was horrified when she was served with court papers at her book signing at Bookhamp ton in East Hampton on Saturday by ex-husband Al Reynolds. Spies say the former “Celebrity Appren tice” star was “noticeably upset” after the processor collared her to serve the papers and snap a picture. Sources say Reynolds had been having difficulty serving Star since he filed a lawsuit against her in May for allegedly breaking a divorce agreement be cause she was traveling around the country promoting her book, “Satan’s Sisters.” They had an agreement in their 2008 divorce not to make “disparaging remarks” about each other. But now Reynolds is demanding $50,000 from Jones for al legedly breaking the clause by calling their marriage “kind of booty” on Wendy Williams‘ show on March 28. Reynolds’ rep declined to comment. Jones’ rep said she couldn’t be reached. A rep for her publisher, Gallery, declined to comment.