Appearing on Daybreak on Tuesday with all of his finalists, Gary addressed the news that 22-year-old Sese is five months pregnant with her second child, saying, "We're set up in the studio now for birth!".
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As for the excited mum-to-be, she said she was drawing inspiration from The Saturdays stars Rochelle Humes, Frankie Sandford and Una Healy, who all performed while pregnant.
"They're very inspirational," SeSe said. "I've got a lot of inspiration just strengthening me, plus my girlies, and Gary — everyone is just so supportive."
SeSe and Gary were joined on the Daybreak sofa by her new bandmates Jeanette and Rielle — the girls auditioned separately but were brought together by the Take That star — and Gary's two other finalists, Kingsland Road and Rough Copy.
Chatting on Lorraine later on, Gary said Kingsland Road reminded him on his early days in Take That. "The only thing I'm envious of in this band is the hair, " he joked. "I remember hair like this," he joked.
He went on to say, "There's a great bunch this year in every category, it feels like for the first time since I've been on the show, there's a possible winner in every category."
He also said he was delighted to have judge Sharon Osbourne back on the panel.
"It's great having her back — we love her. It's a happy show to be on this year."