According to an article in The Straits Times Communities, the collective, whose 90-plus singers and dancers are rotated in and out of the limelight according to their waxing and waning popularity, regularly pump out songs that sell more than a million copies.
But the management behind one of the most successful brands in showbiz put out advertisements last month seeking older members to branch out of its teen and early-20s demographic.
Enter homemaker Mariko Tsukamoto, a mother of two, who was picked from a pool of over 5,000 applicants including an 82-year-old lady, according to local media.
Tsukamoto will take part in live concerts and promotional events through August.
"I want to cheer up all the mums out there who are busy raising kids, like me," she said in a statement on Thursday.
Photos 1 and 2 show snapshots of the 37-year-old mother, while the rest of the gallery shows other photos of the girl group.