Wellens had filmed Smith attempting the cinnamon challenge and posted a video on the Internet, starting the serial pranking of each other.

In 2012, Wellens and Smith appeared as Spartan King Leonidas I and Queen Gorgo in the web series Epic Rap Battles of History, in season two, episode 2 "Master Chief vs.

Produced by Les Professionnels,[10] the song peaked at #68 on the UK Singles Chart and was number one in Sweden for a couple of weeks.

While the full-length episodes were only available to YouTube Red subscribers, Wellens and Smith provided condensed versions featuring the highlights of the pranks free of charge to the public.

The videos also have frequent guest appearances by other YouTubers, including Louis Cole, Roman Atwood, Alli Speed, Andy Milonakis and Charles Trippy.

[16] On May 18, 2016, Wellens and Smith announced on BFvsGF they have decided to place their relationship on "hiatus" and they would be taking a break from vlogging for the foreseeable future.