The 16-year-old topped the podium in the girls' 100 metres butterfly and was also a member of the Singaporean relay team which won the mixed 4x100m freestyle event.

Jarryd Baxter of South Africa was another swimmer to win two gold medals tonight.

Compatriots Michael Houlie and Mariella Venter also tasted victory for the second time this week.

Their performances helped South Africa win five of the nine gold medals up on offer this evening.

Quah had completed her individual hat-trick at the sixth edition of the Commonwealth Games by winning the girls' 100m butterfly.

The Singaporean, who caught the attention of those in her native country by setting a National Championships record in the 200m butterfly event earlier this year, was the only athlete to go under the one minute barrier as she finished the race in 59.92sec.

Her time saw her add the 100m butterfly crown to the gold medals she had already secured in the 100m freestyle and 50m butterfly events.

Ciara Schlossan of England held off the challenge of New Zealand's Hannah Bates to clinch the silver medal.

Quah then spearheaded Singapore, whose team also included Jonathan Tan, Yi Shou Chua and Natasha Ong, to the gold medal in the mixed 4x100m freestyle relay in a combined 3min 36.01sec.

England were second and Scotland were third.

Baxter began by edging Lewis Clareburt by a narrow margin to win the boys' 400m freestyle in 3:53.76 as the New Zealander had to settle for the silver medal.

England's Jakob Goodman won the bronze medal.

The 18-year-old South African rounded off another fruitful outing for his nation in the pool as he proved far too strong for the rest of the field in the boys' 200m backstroke, clocking 2:00.90 to comfortably beat James McFadzen of England.

Francis Fong of Singapore earned the bronze medal.

Houlie continued his fine form in the breaststroke as he sealed the 50m and 100m double by powering to victory over two laps in 1:01.86.

Singapore's Zongxian Khoo claimed the silver medal.

Izaak Bastian of The Bahamas won his second medal of the event with bronze,

Venter also clinched her second gold of the event, adding the 200m backstroke title to her 100m title in a time of 2:13.57.

England's Lily Boseley, winner of a thrilling girls' 50m backstroke race yesterday, took silver this time around.

The bronze medal went to Wales' Medi Harris.

Venter's team-mate Hanim Abrahams finally won a  gold medal as she enjoyed success in the girls' 100m breaststroke in 1:10.14.

Ciara Smith of New Zealand claimed silver and Singapore's Christie Chue bronze.

Wales had triumphed in the previous race thanks to the exploits of Lewis Fraser, who clocked 53.87 to defeat Singapore's Dylan Koo and Jung Ong Yi.

Leah Crisp of England claimed the girls' 400m freestyle honours by just 0.07 seconds as she touched the wall in 4:16.36 to beat Northern Ireland's Rachel Bethel .

Sophie Caldwell of Australia won the bronze medal.

Swimming's programme at the 2017 Commonwealth Youth Gamed is due to conclude tomorrow when there are another eight gold medals on offer.