It's estimated that Amma has given 30 million hugs to people around the world.
"She encourages people to go deeper into their own faith, really, to be better Christians, to be better Muslims, to be better Jews. The core of all those religions are the same. They basically are about compassion, and that's what she's exemplifying here," said Rob Sidon, who was organizing an event for Amma.
Amma's hugs are given for free, but many people do leave donations.
She has raised millions of dollars for victims of disasters like Katrina, the Asian tsunami and the earthquake in Haiti.