Sun, who has always kept her personal life private, shared a little anecdote about her 1 1/2- year-old son at her new National Stadium last Saturday night.
According to a report in The Straits Times, she said he has a magic finger because whenever he points at a door, or milk or biscuits, the door will open and he will get his milk and biscuits.
"Can I feel what it's like to be him?" asked Sun. She pointed at the crowd and her fans obliged her by raising the roof.
It was an especially momentous occasion as her Kepler world tour marks her comeback after marriage in 2011 and childbirth.
A concert highlight was the staging of the track Kepler, from her latest album of the same name.
Unfortunately, it proved to be something of a bumpy ride.
Her voice was sounding strained on the low and high notes of the fast-paced Infinite Possibilities.
She then asked: "What's in season in Singapore now? Not me, I was popular 14 years ago."
The answer turned out to be the flu.
And a few songs later, about midway through the concert, she announced after singing the hit ballad Angel's Fingerprints: "This is a little awkward. My voice is almost gone."
She added: "Let's do our best, okay?" and showed her mettle by holding on for a full-length 2 1/2-hour-long show.
The large venue did mean though that more fans could be accommodated in one space and the atmosphere this brought about was great. After her announcement that she was losing her voice, her fans rallied around her, singing along with gusto and shouting out words of encouragement.
It might not have been the perfect homecoming, but it was still a triumphant one for Sun.
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