February 13, 2019 11:43 pm ‘Tonight': ‘Know It All' With Steve Martin and Martin Short Steve Martin and Martin Short face off in a game of knowledge and deception to see who can name more things in different categories before time runs out. 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