2015 has been the best year so far for viral videos on YouTube. From pizza rat to the boston fisherman catching a baby "whale," our Top 100 viral videos of 2015 has the most viewed clips of the year. So, sit back and enjoy the most popular YouTube videos of 2015!
SUBSCRIBE for awesome videos every day!: http://bit.ly/JukinVideo
LIKE us on FACEBOOK: http://bit.ly/JukinVideoFB
FOLLOW us on TWITTER: http://bit.ly/JukinVideoTwitter
Short vids on INSTAGRAM: http://bit.ly/JukinVideoInstagram
Shorter vids on VINE: http://bit.ly/JukinVideoVine