Kristin Davisis showing off her prowess with a power tool, along with her big heart, on an all-newCelebrity IOU.

Under the direction ofProperty Brothers’DrewandJonathan Scott, theAnd Just Like Thatstar is helping out her close friend and fellow single mom Tiffany, who she says has been there for her “through the years in so many of those ‘pinch’ moments.”

PEOPLE got an exclusive first look (above) at Davis' heartfelt renovation for her pal, whom she met when their daughters became best friends at school. Davis, who is a single mom to daughter Gemma, 10, and son Wilson, 3, notes that Tiffany has two jobs and was looking for a third to help stay afloat.

“She would never ask for anything, ever,” says the star.

Discovery, Inc.

Kristin Davis, along with Drew and Jonathan Scott, reveal the finished renovated home to Kristin’s long time friend, as seen on Celebrity IOU

On the way to meet Davis at Tiffany’s Compton home, Drew shares that he has “always heard that Kristin was just the nicest person in the world.”

“She’s got such a big heart,” he continues, “and the fact that we can help give back to Tiffany and her daughter Lyric to give them a more beautiful home — that’s pretty cool.”

Adds Jonathan, “Kristin told us Tiffany has been an inspiration and a constant source of support and guidance to her and she’s been trying to think of a way to say thank you.”

Kristin Davis, along with Drew and Jonathan Scott, reveal the finished renovated home to Kristin’s long time friend, as seen on Celebrity IOU

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Later in the episode, Tiffany gushes about how “awesome” Davis is and how real their relationship is with each other. Tiffany keeps Davis “on point,” the actress says, sharing that there aren’t many people in her life who do that and keep her in check.

Drew and Jonathan’s favorite part about working with A-list stars on their show goes much deeper than the laughs they share, they tellPEOPLE.

source: people.com