YouTube unveils its Rewind mash-up of 2015's trending videos

Including Justin Bieber, The Weeknd and a host of YouTube stars.

Justin Bieber and The Weeknd are among the tracks featured in YouTube's Rewind 2015 - a mash-up of the biggest viral videos of the year.

The video streaming site has trawled through the millions of clips uploaded to the site every year and compiled them together to show us all the biggest moments of the year.

Songs featured in the montage are Justin Bieber's Number 1 single What Do You Mean?, as well as Silento's Watch Me (Whip/Nae Nae) and The Weeknd's Can't Feel My Face. Watch below:

Shia LaBeouf's memorable video in which he told all to 'just do it' is also parodied in a variety of languages, and their are appearances from YouTube stars including Zoella and Miranda Sings.

The video also looks back at some of the most viral trends of the last ten years, including the memorable 'Charlie bit my finger' clip, the Ice Bucket challenge and Rebecca Black's Friday.