The house rivals have continued to war following their respective evictions from the Channel 5 show, trading insults in the press and on Twitter.
Their feud hit a new level this week after Lennard allegedly accused Sugden of leaking a nude photo of her online.
The ex-girlfriend of Simon Cowell has since contacted police over the matter and hired the lawyer who aided Tulisa Contostavlos during her sex tape scandal.
After Sugden tweeted that she was "looking forward to seeing everybody again" at the Celebrity Big Brother final, Lennard wrote on her own profile: "I sincerely doubt @Rhianmarie will be 'smirking' tonight.
"Let's see how brave barbie is without her gang of pg 3 whores behind her.If i was...@Rhianmarie i would be afraid. VERY afraid right now."
She also told a follower that she is "not looking forward to going" to the Elstree event, adding: "I can definitely think of better company to spend my...friday night with."
Sugden previously said that she was "scared to death" of Lennard while they were on the show and claimed that the 27-year-old once threatened to kill her.
Lennard has also been caught up in feuds with her Celebrity Big Brother co-star Danica Thrall and Kerry Katona.