In 2013, the world unfortunately lost a good man in Paul Walker.
The 40 year-old actor, husband and brother tragically passed away in a car accident along with his friend Roger Rodas.
Walker was a passenger in a Porsche, which unfortunately lost control and careened off the road.
Walker originally rose to fame with roles in "Varsity Blues" and of course as Brian O'Connor in the now legendary "Fast and Furious" franchise.
As you can see in the pictures in the video below from Diesel's Facebook, and his Instagram account, the friendship extended way beyond what we saw on the screen.
You can watch Diesel's touching "Habits" cover below. The emotion in his voice pretty much says it all.
However, as somber as these last few years have been for the "Fast" family, it seems as though Walker has been shining down on them the whole time.
Considering the "Fast" franchise started as a relatively unknown and original entity, it really is incredible it has become one of the most recognizable movie series in the world.
Along with that accomplishment, his tribute song, "See You Again" by Wiz Khalifa and Charlie Puth, has been at #1 on the Billboard Hot 100 for over a month. It also has 340 million views on YouTube.
The song even knocked off Bruno Mars' and Mark Ronson's "Uptown Funk" after a 14 week reign.