YouTube stars Ryan Taylor and Ally Law recorded themselves by the CBB front door as they filmed the celebrities through the glass door.
The pair posted footage of the Celebrity Big Brother 'break-in' on Snapchat and told their fans that they would put the full stunt on YouTube very soon.
In the video, Ryan tells Ally that they "have to be quick" as they record Ashley James and Ann Widdecombe standing in the living room.
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Jonny Mitchell and Ginuwine can also be seen standing at the bottom of the stairs.
Ryan's snapchat seems to show him filming through a whole in the top of the stairs where Jonny, Dapper Laughs and John Barnes are stood in a circle with their backs to the camera.
Ally is also seen in the shot wearing an orange jacket and a head torch, presumably to make him look like an onset worker.
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He later posted: "Tonight was a madness!! There will be no video but I promise it will make sense soon, stay tuned."
The vlogger amended: "Guuuuys, there should be a video tomorrow night! Bear with me, I've been stupidly busy."
Fans claimed that the pair had been caught and threatened with arrest, but the pair retweeted and who said they were "eating cookies from Tesco".
Channel 5 confirmed to Daily Star Online: "Last night, two intruders were apprehended by security at Elstree Studios.
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"The safety of housemates, production and audience members is of paramount importance and Big Brother has appropriate security measures in place at all times."
Ryan and Ally are well known on Youtube for their dangerous stunts, and have racked up over half a million social media followers.
Some of their stunts include breaking into the O2 Aren, breaking into Bracknell's Coral Reed waterpark, and riding a BMX off a diving board into the Olympic pool.
CBB continues tonight at 9pm on Channel 5.