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! <br />SUBSCRIBE for awesome videos every day!: http://bit.ly/JukinVideo <br />LIKE us on FACEBOOK: http://bit.ly/JukinVideoFB <br />FOLLOW us on TWITTER: http://bit.ly/JukinVideoTwitter <br />Short vids on INSTAGRAM: http://bit.ly/JukinVideoInstagram <br />Shorter vids on VINE: http://bit.ly/JukinVideoVine
