January 31, 2017 1:04 am ‘Late Night': Crowd Scientists Debate Trump's Inauguration Turnout Host Seth Meyers gets down to the bottom of Donald Trump’s actual inauguration crowd size, by talking to actual crowd scientists. US & World Videos 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 5:57 Why your monthly horoscope for May is looking lucky