5. Diana Ser, 49
PHOTO: DIANA SER/INSTAGRAM
Diana Ser does not need social media to shame her. After all, her three children aged 15, 13 and 10 cast sassy judgment on what she wears on a regular basis.
The TV host says: "I don't worry about other people's expectations as the opinions of teens and a tween at home already keep me busy. Once, I wore kitten heels with denim shorts and my youngest looked at me and said, 'Heels and cut-offs? I don't think so.'"
Ser feels that once you put yourself out there on Instagram (where she has 83,800 followers), one should brace oneself for the heat. "I used to be taken aback. Why would you say things like that. One comment was, 'You're a try-hard, look at so-and-so - now that's natural', about someone 20 years younger. Even if you think you're strong-minded, you may go, 'Is this person right?'
"The lesson is, we should never rely on social media as the only feedback on ourselves.
"I tell my daughters, 'Before you want to judge or criticise an older woman, think of what you will look like when you are that age.'"
She feels flattered that most people compliment her by saying she "doesn't seem to have changed".
The petite 1.53m-tall presenter, who is married to former actor James Lye, has even managed to maintain her pre-pregnancy weight of 47kg.
She stays in shape by clocking at least 15,000 steps a day, as well as doing cardio exercises at the gym or park, and practising pilates at home three to four times a week.
She swears by oblique exercises to help define her waistline - she wears size 25 jeans - and is big on nutrition. "I don't subscribe to a win-win situation. I don't have my cake and eat it."
If she has a big breakfast, then she goes for lighter meals such as fish and vegetables for lunch and dinner. She has cut out red meat, chooses complex carbs and avoids processed foods. And if she is feeling peckish, she munches on grapes instead of chocolates.
A few years ago, she was "miserable" when she suffered from acne, so she reduced her sugar intake. For instance, instead of spreading kaya on her toast, she substituted it with olive oil. After a few months, she lost 2kg and her skin cleared up.
She believes in being an early sleeper and riser too, going to bed at 10pm and waking at 5am.
"I had my youngest child when I was 39, so I do have to keep healthy and keep my energy levels up," she adds.
Ser turns 50 in April, but has told her family not to throw her a big birthday celebration.
She says: "It's not that I'm embarrassed. I just want to do it quietly, like how I did 40. And before you know it, you've passed the milestone."