Olympic golden girls Mollie O'Callaghan, Kaylee McKeown and Emma McKeon and medley star Se-Bom Lee produced the headlining performances as the New South Wales state swimming championships came to a close at Sydney Olympic Park Aquatic centre.
O'Callaghan, the 100m freestryle world champion from Budapest last year, toppled Olympic champion and training partner Ariarne Titmus in an epic 200m freestyle final on Sunday.
In a hint of bigger things to come, rising star O'Callaghan timed her final 50m to perfection to win the 200m title in 1:55.27 from Titmus (1:55.53), with Shayna Jack (1:57.29) a gallant third.
The effort places O'Callaghan at No.3 in the world this year behind Canadian wunderkind Summer McIntosh's world junior record of 1:54.13 and Katie Ledecky's 1:54.96, with Titmus equal fourth alongside Hong Kong's Siobhan Haughey.
Star of the meet McKeown finished her campaign in style, adding two more gold medals in the 200IM and the 50m backstroke to her world record breaking 200m backstroke on the opening night and her fastest time this year to win the 100m backstroke.
McKeown's winning time in the medley of 2:08.27 was a new NSW all-comers record, only 0.08 outside her best of 2:08.19, set in 2019 and 0.24 seconds outside Canadian McIntosh's leading world time of 2:08.08, set last week in Fort Lauderdale.
McKeon turned the clock back six years to win the 200m butterfly in 2:07.79 from Brittany Castelluzzo and 15-year-old Mikayla Bird.
Australia's most successful Olympic and Commonwealth Games medallist clocked her personal best times of 2:07.37 and 2:07.49 back in 2017.
Tokyo debutant Lee added the 400IM gold to his 200IM win from Saturday night in another classic neck-and-neck battle with teenager Will Petric, Lee winning in 4:17.79 from Petric in 4:18.74.
