TOP FIVE MOST TOUCHING DAVE LETTERMAN MOMENTS!

In honor of Letterman's final show tonight, we thought we would honor Dave in a different way, by counting down the Top Five Moments where Dave Letterman got serious and sincere....

#5) Letterman pays tribute to his mentor Johnny Carson after his death...

#4) Letterman pays tribute to his surgical team that saved his life with heart surgery....

#3) Letterman talks about his late, great friend and singer/songwriter Warren Zevon...

#2) Letterman honors Robin Williams after his death...

#1) Letterman speaks to the country after 9/11