As Paris and the world continue to mourn after Friday's horrifying attacks, musicians have paid tribute to the victims with touching renditions of some of history's most emotional songs.
From a pianist playing "Imagine" outside the site of Friday's deadliest massacre to a group of imams singing France's stirring national anthem, here are some of the most moving musical tributes to the victims of the Paris attacks:
Pianist Plays 'Imagine' Outside The Bataclan
German pianist Davide Martello traveled 400 miles in the middle of the night to bring his grand piano to the Bataclan theater, where at least 89 people were methodically killed by attackers who held the concert hall hostage.
While mourners gathered outside the concert hall to pay their respects on Saturday, Martello played John Lennon's "Imagine."
Violinist Moves Crowd To Silence At London's Trafalgar Square
During a vigil in London on Saturday, a hush fell over the crowd as a solo violinist played two pieces of music before packing up his instrument and disappearing into the throng of people.
The Met Opera Opens With 'Le Marseillaise'
Led by famed tenor and conductor Plácido Domingo, the Metropolitan Opera in New York City opened its Saturday matinee with the French national anthem, "Le Marseillaise."
According to The New York Times, the words to the anthem were placed in each attendee's program, and some audience members rose to their feet to sing along.
Guitarist Plays 'Hallelujah' During Paris Vigil
A guitarist repeatedly played Leonard Cohen's "Hallelujah" during a Sunday vigil in Paris' Place de la République, prompting the crowds to sing along.
French Parliament Sings National Anthem
French lawmakers broke into "Le Marseillaise" after President Francois Hollande addressed a joint session of parliament on Monday.
Mourners Sing 'Hey Jude' In Tribute To Victims
Crowds at the Place de la République in Paris broke into The Beatles' "Hey Jude," chanting the chorus and clapping along to the beat of the song.
New York Mourners Sing 'La Marseillaise'
As news of the attacks unfolded Friday night, mourners gathered in New York City's Union Square to hold a vigil for the victims. The crowd, which included some French exchange students, was largely silent until they began singing "Le Marseillaise," according to Gothamist.
Imams Sing At The Bataclan
A group of imams gathered outside the concert hall Sunday, where they joined mourners in praying and singing "Le Marseillaise."
Know of a musical tribute to Paris we missed? Email mollie.reilly@huffingtonpost.com with the details.
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