"I definitely have the hookup for Demi, if she wants to be with Mike," Hannah tells ET. "I would give her my blessing."
Hannah also said she was appreciative of Demi's support throughout her season.
"I'm just really glad to have somebody in my corner that's so supportive that's been through this type of public eye in a much larger capacity than I have, that can really just be there for me," she shares. "And I'm just really thankful for her."
Fans have been wanting 26-year-old Demi and Mike -- a 31-year-old portfolio manager -- to get together after the singer gushed about him on her Instagram Stories on July 1, the night Hannah sent him home from the competition.
She continued the flirtation when she commented on his Twitter post the same day, in which he talked about finding his future wife.
"Jus saying, my future wife though," the Texas native tweeted, adding a rose emoji. "Girl you ready for smiles, adventure, comfort, growth, honesty, laughter, me falling using my inhaler and kissing your stretch marks and imperfections. Where u hiding."
Demi hilariously commented, "I’M RIGHT HERE MIKE I’M RIGHT HERE BOO MY MOM ALREADY LOVES YOU TOO."
Jus saying, my future wife though🌹girl you ready for smiles, adventure, comfort, growth, honesty, laughter, me falling using my inhaler and kissing your stretch marks and imperfections. Where u hiding👀
In an interview earlier this month, Mike made it clear he was definitely interested in the pop star.
"I'm flirting with her too," he told Us Weekly. "Tell her, 'What's up, baby?' I would definitely take her out for an initial date, yeah. One hundred percent not scared about it at all. I would be like, 'Oh my god! Girl, come here.'"
Although, Demi might have plenty of competition. ET spoke with Mike earlier this month at the Bachelorette: Men Tell All taping, where he talked about potentially being the next Bachelor.
"I haven't spoken to no one about it," he said. "Yes, my homies from the show were speaking on it, and it's really cool to hear that."
Meanwhile, for more on Tuesday night's dramatic finale, watch the video below: