Pink slipped "under the radar" during a recent family day out in London

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 watch the production without being noticed by fans.

The insider added: "There was no fanfare, she slipped under the radar without a single selfie."

Meanwhile, Pink previously admitted to doubting whether she would be a good mother.

The pop star was actually terrified that she'd be a "terrible" mom.

She told PEOPLE: "I did not know I was going to have a family. I didn't picture that for myself because I was terrified I would be a terrible mother. But, oh my God, being a mom is the most incredible thing I've ever done. It's shocking how responsible I've become."

Pink's life has been totally transformed by parenthood.

The 'Get the Party Started' hitmaker explained: "I was in charge of snacks for last week's basketball game; I'm chaperoning Willow's dance next Friday ... Who am I? But I love it."

Despite this, Pink acknowledged that it's difficult to balance motherhood with her music career.

She said: "I want to be the best I can be at everything, and it's never good enough; it's impossible.

"But I love being a mom, I love music, and I'm dumb lucky I get to do all of these things. I count my blessings every single day."