Famous faces at Davos 2016

Actor Leonardo DiCaprio looks on during the 22nd Annual Crystal Awards at the opening of the World Economic Forum in Davos on Jan. 19, 2016.

More than 40 heads of states and governments attend the WEF in Davos, which this year is focused on "Mastering the Fourth Industrial Revolution."

will.i.am

Musician William Adams aka will.i.am delivers a speech next to World Economic Forum founder and executive chairman Klaus Schwab's wife Hilde after he was honored at the 22nd Annual Crystal Awards in Davos on Jan. 19, 2016.

Crystal Awards

From left to right, Danish-Icelandic artist Olafur Eliasson, musician will.i.am, Chinese actress Yao Chen and actor Leonardo DiCaprio pose with their Crystal Awards next to Hilde Schwab and her husband Klaus, WEF Executive Chairman and founder during the annual meeting of the World Economic Forumin Davos, Switzerland, on Jan. 19, 2016.

Crystal Awards

Musician will.i.am, left, Chinese actress Yao Chen and actor Leonardo DiCaprio pose with their Crystal Awards during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan 19, 2016.

Queen Mathilde

Queen Mathilde of Belgium looks on during the 22nd Annual Crystal Awards at the opening of the World Economic Forum in Davos on Jan. 19, 2016.

Yo-Yo Ma

Cellist Yo-Yo Ma performs during the open forum workshop "Making Music across Borders with Yo-Yo Ma" at the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

U.S. Vice President Joe Biden

U.S. Vice President Joe Biden is accompanied by his daughter Ashley and wife Jill as he arrives at the airport in Zurich, Switzerland, on Jan. 18, 2016.

U.S. Secretary of State John Kerry

U.S. Secretary of State John Kerry arrives in Zurich, Switzerland, on Jan. 20, 2016, where he is expected to meet with Russian Foreign Minister Sergey Lavrov about Syria, and later attend the World Economic Forum in Davos. Kerry's trip is expected to last nine days and to encompass stops in Switzerland, Saudi Arabia, Laos, Cambodia, and China.

Queen Rania

Jordan's Queen Rania attends the session "The Humanitarian Imperative: A Global, Regional and Industry Response" during the annual meeting 2016 of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Hamdi Ulukaya

Hamdi Ulukaya, Chief Executive Officer of Chobani, attends the session "The Humanitarian Imperative: A Global, Regional and Industry Response" during the annual meeting 2016 of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

President Paul Kagame

Paul Kagame, president of Rwanda, attends the session "The Transformation of Tomorrow" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

President Joachim Gauck

German President Joachim Gauck attends the session "Hoping for Prosperity: Reflections on Flight and Migration to Europe" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Prime Minister Justin Trudeau

Canadian Prime Minister Justin Trudeau delivers a speech during a session of the World Economic Forum in Davos, on Jan. 20, 2016.

Sheryl Sandberg

Sheryl Sandberg, Chief Operating Officer of Facebook attends the session "The Transformation of Tomorrow" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Anand Mahindra

Anand Mahindra, Chairman of Mahindra attends the session "The Transformation of Tomorrow" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Satya Nadella

Satya Nadella, CEO of Microsoft attends the session "The Transformation of Tomorrow" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Christine Lagarde

International Monetary Fund Managing Director Christine Lagarde gestures during a session entitled "Global Solutions to Global Migration" at the World Economic Forum in Davos, on Jan. 20, 2016.

Mary Callahan Erdoes

Mary Callahan Erdoes, chief executive officer of JPMorgan Asset Management, attends the session "The Growth Illusion" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Axel A. Weber

Axel A. Weber, Chairman of the Board of Directors of UBS, attends the session "The Growth Illusion" during the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Iranian Foreign Minister Mohammad Javad Zarif

Iranian Foreign Minister Mohammad Javad Zarif speaks during a special session of the World Economic Forum in Davos, on Jan. 20, 2016.

Vitaly Klitschko

Vitaly Klitschko is interviewed during the World Economic Forum in Davos, Switzerland, on Jan. 20, 2016.

Klaus Schwab

World Economic Forum Executive Chairman and founder Klaus Schwab gestures during a news conference in Cologny, near Geneva, on Jan. 13, 2016.

Iraqi Prime Minister Haider Al-Abadi

Iraqi Prime Minister Haider Al-Abadi, in Davos, Switzerland, on Jan. 21, 2016.

U.S. Secretary of the Treasury Jack Lew

Jack Lew, U.S. Secretary of the Treasury, speaks during the session "Global Financial Priorities for 2016" at the annual meeting of the World Economic Forum in Davos, Switzerland, on Jan. 21, 2016.

Israeli Prime Minister Benjamin Netanyahu

Israeli Prime Minister Benjamin Netanyahu meets with U.S. Secretary of State John Kerry during the 2016 World Economic Forum in Davos, Switzerland, on Jan. 21, 2016.

British Prime Minister David Cameron

British Prime Minister David Cameron addresses the attendees during the session "Britain in the World" during the World Economic Forum in Davos, Switzerland, on Jan. 21, 2016.

Queen Maxima of the Netherlands

Queen Maxima of the Netherlands attends the World Economic Forum in Davos, Switzerland, on Jan. 21, 2016.