Sycerika McMahon finished off her campaign at the Irish short course championships in Lisburn, Co Antrim with three gold medals and another Irish senior record.
The 17-year-old, voted swimmer of the meet, stormed home to win the 200m breaststroke in a new national best of 2:25.23 ahead of UCD's Shani Stallard (2:30.53).
McMahon, of Belfast club Leander, dominated the 400m individual medley, winning gold in 4:47.80 ahead Lydia Kehoe of New Ross (5:00.30) and she also triumphed in an exciting 200m freestyle final duel with fellow Northerner Bethany Carson, taking her overall tally to eight golds.
Swim Ireland high performance swimmer Carson pushed McMahon all the way but the London 2012 Olympian took gold in 1:59.63. Carson clocked 2:00.08 with UCD's Shauna O'Brien taking bronze in 2:01.50.
O'Brien, who won 100m butterfly gold in 1:00.15 on Saturday night, also set a new Irish senior record of 27.30 when winning the 50m butterfly final – breaking the eight-year-old record of Julie Douglas – yesterday, with silver going to Kilkenny's Jane Roberts in 28.27.
Brendan Hyland and Brendan Gibbons set Irish junior records when taking gold in the 400m IM (4:20.43) and 800m free (8:11.00).