The pair featured in a video that went viral recently, taken when they were finally reunited after weeks apart.
What happened in the clip?
Lisa wears a full-body PPE suit in the clip, which includes a song by Calum Scott.
GMB producers surprised Lisa, Ruby and her dad during the interview by bringing Calum on.
I'm gone here!
And he delighted them with a live rendition of his song, You Are the Reason.
His singing reduced them to tears, and even Ben and Charlotte were crying after his emotive performance.
How did Ben and Charlotte react?
When it was over, Ben said, choking up: "I don't know about you lot but I'm gone here!"
"I know, and me!" Charlotte said. "It really brings it home."
It also had viewers welling up.
What did viewers think?
One said: "Omg @GMB, talk about a tear jerker this morning and how amazing is Callum Scott's voice?"
Another wrote, alongside a heart emoji: "Tears were flowing."
A third put: "I'm already in tears and it's not even 8.30. Thanks @GMB #GMB."
Omg @GMB talk about a tear jerker this morning and how amazing is Callum Scott’s voice
— Karen (@Emily7xox) May 26, 2020
Tears were flowing 💜
— Diane Taylor (@honeyoasis) May 26, 2020
Elsewhere on today's GMB, viewers accused Ben of taking the side of Dominic Cummings.
He took part in a debate about Boris Johnson's advisor going on a long drive despite the lockdown rules - and some viewers at home accused Ben of defending the decision.
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