Pink slipped “under the radar” during a recent family day out in London. The 44-year-old pop star was joined in the UK capital by her husband Carey Hart and their two children – Willow, 13, and Jameson, seven – as the family watched a stage production of ‘Matilda’ in the West End. A source told The Sun newspaper’s Bizarre column: “Pink has been on the road over a year and though Willow comes on stage it’s hard to have family time. “They all love London so Carey made sure to fly out. Willow and Jameson love Matilda the film, so Pink sorted tickets.” Despite her fame and success, Pink managed to…