Horton's victory delivered Australia its first swimming gold medal at the Gold Coast Games.
The 25-year-old Australian took off the whole of 2017 to deal with the disappointment of a Rio Olympics campaign in which she was the favorite to clinch both freestyle sprint titles but failed in both.
I probably feel more emotion here than in Rio (2016 Olympic Games) because the whole crowd is cheering for you.
"I knew I had to mow him that last 200".
Campbell's path back to the winners' circle began on Thursday when she anchored the Australian 4x100m freestyle relay team to a world record.
Australia's Ashlee Ankudinoff celebrates her team's gold medal win in the women's 4000m team pursuit finals track cycling event during the 2018 Gold Coast Commonwealth Games at the Anna Meares Velodrome in Brisbane on April 5, 2018.
While in the Men's, Matt Wilson and Jake Packard will race in the 100m Breaststroke final.
Australia slowly overpowered the English riders and flew home in three minutes 49.804 seconds - shaving almost half a second off the 3:50.265 record which Great Britain set in Rio two years ago.
Koreas holds preparatory talks to set up Kim-Moon summit
North Koreans watch a report showing North Korea's Hwasong-12 intermediate-range ballistic missile launch in August 2017. North Korea may also be likely to sell on its technology to other states that may be more aggressive towards the UK.
The teenage athlete will be representing the country on Friday 13 at the Gold Coast.
Australia has smashed the men's team pursuit world record on way to Gold Coast Games gold.
"I'm very emotional right now", Groves said. The 24 year old from Chittaway Point is set for a strong tilt at a Commonwealth Games Medal to add to his increasingly impressive resume. "The whole South African team just jumping up, it just made me emotional".
That was 0.374s quicker than a New Zealand foursome had gone before. Blair Evans of Australia took the bronze.
The 200m freestyle champion then swam the fastest split time in the relay but ran out of steam in the final few strokes.
Pt.1 This past week I've had to make one of the hardest decisions of my career so far and I would like to firstly say thank you to medical professionals at SASI for being so diligent throughout this process because without them life could have be a lot worse.
The result caps another excellent day for Australia, who now have a total of 32 medals from their exploits in the pool, including 11 golds.