Elizabeth clocked 12.52s in the final against a headwind of 0.7 metre/second, shy of her championship record 12.07s. Ho Zhi Xuan from CHIJ St Nicholas Girls' School claimed the silver with 13.29s, while Singapore Sports School's Rachel Tan finished third with 13.89s.
Diane clocked 1:01.04, while teammate Zann Oh edged out Grace Shani Anthony of RGS by 0.01s for the silver.
Thiruben's time went under the electronically-timed (ET) championship record of 1:57.10, set by ACS(I) alumnus Zachary Devaraj in 2011.
Celeste won only her second National Schools 400m gold, her first being her C Division triumph in 2013.
Samel Sahil Chetan of Singapore Sports School finished second in 53.10s, while Tan Zhi Hao of Hwa Chong Institution finished third in 53.65s.
Thiruben's winning time of 48.71s was marginally off Zubin Muncherji's championship record of 48.69s.
When Hwa Chong Institution's Justyn Phua lined up to take his fourth throw in the A boys' javelin competition, he was trailing junior teammate Wang Tingjia in second. A few minutes later, he not only bettered Tingjia's best throw, but also a national schools and championship record that has stood since 1970.
Three seconds were all that separated Raffles Institution's Sean Tay and Nan Hua High School's Lim Yu Zhe at the cross country nationals a month ago. The gap came down to 0.06 second between the two boys in the C division 3000m race at the 58th National Schools Track and Field Championships.
