The 41 year old make-up artist was on the BBC show on Tuesday evening where she demonstrated how to apply make-up to a male dancer.
During the tutorial, the star was seen defiantly showing off her wedding ring after hitting out at claims over her marriage.
Ant McPartlin and Lisa Armstrong were recently questioned by fans when she didn't travel with her husband to Australia for the launch of I'm A Celebrity...Get Me Out Of Here!
The TV star, who took time off earlier this year to spend time in rehab, has landed in the jungle with presenting co-star Declan Donnelly for a brand new series of the ITV show.
Hitting back at reports asking why she didn't go with him, Lisa explained that she hasn't joined Ant for filming of the show for over a decade.
Taking to Twitter, she also fired back at claims their 23-year romance had broken down in a strongly worded message shared with her 94k followers.
Ant McPartlin and Lisa Armstrong are all smiles after tying the knot in 2006 [Getty]
Ant McPartlin married wife Lisa Armstrong in 2006 with I'm A Celebrity...Get Me Out Of Here co-host Declan Donnelly in attendance – click here to see all the pictures from their big day
"#writewhatyouwant #haventbeentoOzfor10years #ihaveajob #allaloadofmadeups**t #imnotestrangedthank-you #asyouwere," she tweeted.
Lisa’s words come after Ant opened up about returning to the jungle, admitting he was "feeling great" ahead of the ITV series starting on Sunday, November 19.
"I'm excited to be back, I can't wait. It's going to be a good show," he told The Sun.
"I’m feeling great. The flight was all right, I had a lot of sleep and me and Dec had a good catch-up."
The Britain's Got Talent host also revealed he was happy to be reunited with Dec adding: "I’m looking forward to spending more time with him.
"It’s brilliant to be back together, it’s perfect. Everything just slotted back into place. We can’t wait and we’re raring to go. We are really excited."
It Takes Two continues on BBC2 while I'm A Celebrity returns to ITV on Sunday.
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