Kimberley Walsh is “mindful of everything” she posts on social media. The 42-year-old pop star – who has Bobby, nine, Cole, seven, and three-year-old Nate with her husband Justin Scott – doesn’t want to spread any kind of “negativity” with her online presence and tries to show the “good stuff” in her life but doesn’t feel like she needs to be posting constantly to begin with. She told OK! Magazine: “I’m mindful of everything that I post. The last thing I’d ever want to do is make anyone feel bad or in any way negative because of social media. I do show my reality but equally I don’t delve too …