Neil Patrick Harris introduces 2016 Top 10 CNN Hero Sherri Franklin at the 10th Annual CNN Heroes All-Star Tribute.

Edie Falco introduces 2016 Top 10 CNN Hero Brad Ludden at the 10th Annual CNN Heroes All-Star Tribute.

Edward Norton introduces 2016 Top 10 CNN Hero Luma Mufleh at the 10th Annual CNN Heroes All-Star Tribute.

Diane Lane introduces 2016 Top 10 CNN Hero Harry Swimmer at the 10th Annual CNN Heroes All-Star Tribute.

Keegan-Michael Key introduces 2016 Top 10 CNN Hero Sheldon Smith at the 10th Annual CNN Heroes All-Star Tribute.

Danielle Brooks introduces 2016 Top 10 CNN Hero Craig Dodson at the 10th Annual CNN Heroes All-Star Tribute.

Liev Schreiber introduces 2016 Top 10 CNN Hero Umra Omar at the 10th Annual CNN Heroes All-Star Tribute.

Taraji P. Henson and Octavia Spencer introduce 2016 Top 10 CNN Hero Becca Stevens at the 10th Annual CNN Heroes All-Star Tribute.

After Hurricane Katrina, Liz McCartney founded SBP, a nationally recognized leader in disaster recovery that has rebuilt nearly 1,200 homes in the US. She is nominated for the CNN SuperHero award.

Efren Peñaflorida's nonprofit, Dynamic Teen Company, brings education to thousands of children who have dropped out of school in the Philippines. He is nominated for the CNN SuperHero award.

Robin Lim's organization, Bumi Sehat, was founded in 1995 and has since provided medical care to more than 300,000 expectant mothers and babies in Indonesia and the Philippines. She is nominated for the CNN SuperHero award.

Providing housing, education, healthy meals and medical services, Pushpa Basnet's Early Childhood Development Center responds to the needs of children forced to live inside Nepal's prisons. She is nominated for the CNN SuperHero award.

Take a tour of 2013 Hero of the Year Chad Pregracke's unusual barge. 'Rescuing the River' airs Friday, Dec. 5 at 10pm ET

Richard Gere introduces 2016 Top 10 CNN Hero Georgie Smith at the 10th Annual CNN Heroes All-Star Tribute.

Laurie Hernandez introduces 2016 Top 10 CNN Hero Jeison Aristizábal at the 10th Annual CNN Heroes All-Star Tribute.