Adam Peaty and Ben Proud delivered a double dose of gold for Great Britain at the World Aquatics Championships, while Katinka Hosszu gave the home fans something to shout about in Budapest.
Defending world and Olympic champion Peaty claimed 100 metre breaststroke gold in a championships record time of 57.75 seconds, having earlier set a new marker in the semi-finals.
World record-holder Peaty finished more than a second clear of closest challenger Kevin Cordes (58.79secs) of the United States, while Russia's Kirill Prigoda (59.05secs) took bronze.
Commonwealth champion Proud, meanwhile, won the won the 50m butterfly, having qualified fourth fastest from the semi-finals, although he was happy just to be in the pool.
"I was panicking before as I couldn't get my clothes off," he is quoted as saying by BBC Sport. "But once I put my foot on the block, it was just about me and my race."
Hosszu won three gold medals at last year's Olympic Games and retained the 200m individual medley title she won in 2013 and 2015 to the delight of the Hungarian supporters on Monday.
The result makes Hosszu the first swimmer to win three golds in the event at the World Championships.
"I have been training in this pool since it opened, trying to imagine the crowd," she said. "You can't be ready for such an amazing atmosphere. It is crazy!
"I have always dreamt to be an Olympic champion but today's feeling, racing at home in front of this crowd, was different. I can't compare."
Sarah Sjostrom, meanwhile, continued her dominance of the 100m butterfly by collecting her fourth gold in the event, having also won in 2009, 2013 and 2015.