Best Man sings the 'Best Best Man Speech Ever!'

Being the best man is a hard gig, and while it's not a difficult feat to bungle up between being too awkward, rehashing lame old gags -- or offending family -- this best man set a new bar in paying tribute to a newly wed couple. Watch below.

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Australian musician Daniel Buccheri delivered the best man's speech at his brother Adrian's wedding through song, creating an original medley of hit songs by Sam Smith, the Backstreet Boys, R Kelly and Elton John, though featuring his own deeply personal lyrics to the bride and groom.

The song is the perfect balance of good humor and deep affection, and Daniel's performance offers an unforgettably touching tribute to his brother and his bride.

In an email to ABC, Daniel shared the following quote he posted online:

As a singer/songwriter you leave yourself quite vulnerable when sharing your original work for the world to judge, so to get such a positive and heartfelt response has been quite overwhelming. I only hope my own original songs can now have that same impact.

I've always said that all I want to do with my music is to make people feel something. To know how many people worldwide have gotten emotional and been touched by this video is a feeling so deep in my heart. We live in such a negative world where we are continually forced to hold ourselves back from achieving greatness and if I can shine a light with the gift I've been given, then that's what I'm going to do.

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