Not only is that the name of the middle-grade book series they're teaming up to write for HarperCollins Children's Books—about twin sisters that move to a new town with their mom that combines the family dynamics of Sister, Sister with the moody supernatural vibe of Twilight—but the handy pun also easily explains how close Tia and Tamera remain.
In honor of their new literary venture, the now 36-year-old actresses and TV hosts (not to mention wives and moms) took some time to answer 10 of our biggest questions about their '90s-era selves, from back in the Sister, Sister days.
And wouldn't you know it, more than a few of their answers were...identical!
We asked everything from which TGIF show was their must-watch fave and which boy bands they drooled over to which fashion trends they hope will come back (spoiler: neither said floppy hats) and whether either was secretly crushing on Sister, Sister costar Marques Houston.
Watch and learn—and happy Flashback Friday!
Meanwhile, the first book in their Twintuition series, Double Vision, is due out April 21, 2015.
"As avid readers, we couldn't be more thrilled to be working with HarperCollins on this book series," Tia and Tamera said about their book venture. "We are huge fans of supernatural fiction and have always wanted to write a book that tweens can relate to. This project gives us a chance to combine both interests.
"We are always trying to find ways to connect with our fans who have grown up with us throughout the years, as well as our new ones. Being moms, we know how important reading is to our children. And we can't wait to share the final product with everyone."