Melanie lived on the Spanish island of Ibiza before the group reunited to support the Backstreet Boys on tour in 2014, but she has now moved back to the U.K. to work on the group's revival and new album.
Melanie and her daughter Lillyella are living in Nicole's home following her bandmate's divorce from British rocker Liam Gallagher in 2014.
Melanie reveals to Britain's Observer Music magazine that she still has a place in Ibiza but is currently with Nicole, who adds, "Which was our dream. Eleven years old we said we're going to live together one day and we are... Perfect. We like the same TV. The same food, same everything."
Fellow bandmate Shaznay says their living situation reminds her of fictional Friends roommates Joey Tribbiani and Chandler Bing. She adds, "When you Facetime, they're sat there like Joey and Chandler."
Nicole split from Liam after six years of marriage when it was revealed he had fathered a child with U.S. journalist Liza Ghorbani. They have a 14-year-old son Gene, who lives with her.
Melanie had Lillyella, 17, with British bassist Stuart Zender, they split in 2006.