The only Grinch seen by Richard Feinberg, a professor of consumer sciences and retailing, is an unexpected jolt in the world economy. The holiday season is critical to many U.S. retailers because that's when they make up to 40 percent of annual sales and 75 percent of their profits.
"We're predicting a 4 percent to 7 percent increase in sales over last year," Feinberg said. "A decade ago we considered double-digit increases normal, but now, because of the increase in channels -- the Internet and TV sales -- anything more than 5 percent is considered quite healthy."
Purdue's Retail Institute forecasts a 6 percent jump in Internet sales, which account for $12 billion to $13 billion of the $220 billion in annual holiday sales.
Feinberg says only a catastrophic event can undermine economic confidence of consumers this season.
Selena Gomez drops F-bomb, walks off stage during Jingle Ball performance
'SNL': 'Anchorman 2' cast, One Direction sing 'Afternoon Delight' [VIDEO]