January 6, 2014 9:14 am Deep Freeze Grips Much of US Temperatures could plummet to record lows across much of the US, as a “polar vortex” brings extremely cold air and powerful winds to much of the US. Wind Chill Warnings are in effect from Montana to Alabama. US & World Videos 3:11 Ryan Gosling skips darker film roles because of Eva Mendes and daughters 1:07 Britney Spears spotted as authorities respond to alleged hotel incident 2:15 Prince William and Kate Middleton ‘going through hell,' friend claims (report) 8:01 Lady Gaga's outfit changes, Rihanna's bold looks and more iconic Met Gala moments 2:48 Taylor Swift fans react to Jake Gyllenhaal and Sabrina Carpenter's ‘SNL' appearance