Billy Crystal sings Happy Birthday to Ali

Muhammad Ali celebrated his 65th birthday last night watching his old friend Billy Crystal perform at Arizona State University. The former heavyweight boxing champion joined the comedian on stage, receiving a minute-long standing ovation from the crowd and a cake from Crystal’s wife.

“He’s been a truly great friend to me and a great friend to the world,” Crystal said. “Please join me in singing Happy Birthday to the greatest senior citizen of all time.”