Secretary of State John Kerry shared a fist bump with rapper Snoop Dogg at what appears to be a reception after the 2013 Kennedy Center Honors. Snoop Dogg posted the video to Instagram a few weeks later.
Then-presidential candidate Barack Obama famously bumped fists with his wife, Michelle, on the campaign trail in June 2008.
President George W. Bush greets Santa Claus with a fist bump during a lighting ceremony for the 2008 National Christmas Tree in Washington.
Facebook founder and CEO Mark Zuckerberg fist-bumps a student at Harvard University in November 2011.
Canadian pop star Justin Bieber fist bumps with a girl from northeastern Japan, the area devastated by the March 2011 earthquake and tsunami, at an event at the U.S. ambassador's residence in Tokyo a few months after the earthquake hit.
Musicians Samuel Moore, Mavis Staples and Justin Timberlake fist-bump after Moore sang during a Memphis Soul music workshop hosted by first lady Michelle Obama in the State Dining Room of the White House in April 2013.
Actor Brad Pitt fist-bumps a Japanese school baseball player during the Japan premiere of the film "Moneyball" in Tokyo in November 2011.
First lady Michelle Obama and Archbishop Desmond Tutu bump fists after they participate in youth activities raising awareness for HIV prevention in South Africa in June 2011.
Actor Mickey Rourke does a fist bump with singer Seal at the 81st Academy Awards in Hollywood.
Republican vice-presidential nominee Paul Ryan fist bumps his son Sam, sitting in one of the chairs onstage, while his wife Janna looks on at the conclusion of the U.S. vice presidential debate in October 2012.
U.S. first lady Michelle Obama fist-bumps actor and Obama administration official Kal Penn, the associate director of the White House Office of Public Engagement, as she tours the stage a day before her speech to the Democratic National Convention in Charlotte, N.C., in September 2012.
New Jersey Governor Chris Christie fist-bumps State Senate President Stephen Sweeney as he arrives to give his State of the State address in the assembly chamber in Trenton, N.J., in January 2013.
President Barack Obama fist-bumps with graduate Chauncy Gray while attending the 2009 U.S. Naval Academy graduation in Annapolis, Md.
Venezuela's then-President Hugo Chavez, right, and former Argentine soccer player Diego Maradona, left, bump fists next to former Cuban leader Fidel Castro during a meeting in Havana in July 2011.
It seems that residents of Louisiana are some of the happiest people in the country, and New Yorkers remain some of the unhappiest, according to a new report. Take a look at the happiest - and unhappiest - U.S. cities.