The Manchester lass – who previously disgusted viewers when she made an X-rated confession – accidentally flashed her nipples as she celebrated winning a task.
As she let loose and danced away, her plunging jacket was unable to contain her ample bust and her eye-popping cleavage spilled out of the low-cut number.
The embarrassing moment didn’t go unnoticed by her fellow housemates as they looked on laughing while Chanelle quickly adjusted herself to protect her modesty and got back to enjoying herself.
And her wild antics were only just beginning as the Ex on the Beach star yelled “f***y flaps” at host Emma Willis.
Elsewhere in the Big Brother house, Arthur Fulford became the first person to leave the series after becoming involved in spats with almost all of his housemates.
Big Brother continues tonight on Channel 5 at 9pm.