Oprah, Tyra or Simon – who'll leave the biggest void?

By People Staff
Updated January 11, 2010 07:15 PM
Credit: C.J. LaFrance/Getty; Rob Loud/Getty; Dan Steinberg/AP

First Oprah Winfrey announced that she’s ending her longtime show. Then, Tyra Banks followed suit, saying she’s launching her own production company. Now, Simon Cowell has announced he’s leaving American Idol.