The 30-year-old singer is said to be reconciling with her former band mate's sibling 11 years after they were first seen together, reported Contactmusic.
"They've always got on well, but previously Adam had lived
up in Yorkshire and their paths have gone in different directions.
"Now he's based in London and she's back in town a lot ahead of going back to 'The X Factor' panel, so things just seem to be falling into place. It's early days but watch this space," a source said.