The 39-year-old ended her four-month romance with Chicago Bears linebacker Urlacher in August but there were reports that she had bounced back from her heartache by embarking on a new relationship with celebrity jeweller Pascal Mouawad, reported Daily Express.
"The rumour is not true and I am still single and happy about it," she tweeted.
The 'Two and a Half Men' star also said to fans that she is currently too ill to date because her extensive promotional tour for her new autobiography, 'Bad Habits: Confessions of a Recovering Catholic', has left her with a throat infection.
"I'm in bed with strep throat. Was a long book tour and finally caught up with me," she said.