October 22, 2009 5:10 pm How Well Do Celebrities Know “The Simpsons”? Lance Bass, Nancy Cartwright, Weird Al Yankovic, and Joe Mantegna put their “Simpsons” knowledge to the test. US & World Videos 1:07 Britney Spears spotted as authorities respond to alleged hotel incident 8:01 Lady Gaga's outfit changes, Rihanna's bold looks and more iconic Met Gala moments 5:57 Why your monthly horoscope for May is looking lucky 4:10 What is perimenopause and how can you manage its symptoms? Nurse Barb explains. 6:41 Shawn Stockman of Boyz II Men hits a high note with his solo music career