She hosted a benefit concert for Australian firefighters last month, after the festival she had been scheduled to perform at was cancelled due to the bushfires.
The 25-year-old songstress hired a yacht for the day and went jet skiing with her actor boyfriend, Evan Peters, 32, on the Gold Coast's Wave Break Island.
Halsey seemed relaxed during their outing, kicking back as they cruised along the water.
The couple are believed to be renting a seven-bedroom waterfront property on the Gold Coast during their stay.
The rental also boasts five bathrooms and a four-car garage.
Halsey was asked about her relationship on The Ellen DeGeneres Show, where she referred to Evan as 'my boyfriend'.
Prior to dating Evan, Halsey was in a relationship with English rapper Yungblud, 22, whom she split from in early September.
Sometimes people just break up. It doesn't mean someone cheated or something bad happened or someone f**ked up,' she wrote in a since-deleted tweet.
'Sometimes it just happens. Because life is constantly changing. And adults stay friends and move on.' (Wed 8)
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