Laid-back Swede Camilla Lennarth sang Justin Bieber pop songs as she cruised to her second successive round of five-under 68 to lead the Australian Ladies Masters.
She birdied three of her last four holes to go to 10-under after 36 holes and take a two-stroke lead over Canadian Brooke Henderson, who is in the afternoon field at Royal Pines.
"When I first played the back nine here I didn't think the scoring was going to be as low as this," Lennarth said.
"I've tried to play smart and have not attacked the pins.
"Today I was a bit shaky with my driver and irons and did not hit it close.
"But I had a really nice short game."
Lennarth's playing partners and their caddies entertained themselves with jokes and songs to combat an excruciatingly slow round that took a tick over five hours.
"You do notice it was really slow but you try to adjust and just focus on your shots," she said.
"I'm a bit of a Justin Bieber fan so was singing away for quite a few holes."
Lennarth, 27, has impressive form at Royal Pines. She finished third behind Cheyenne Woods in 2014 and was tied sixth last year behind Su Oh.
"I feel comfortable on the course and also the Gold Coast," she said.
"I play my shots with a little draw and that suits quite a few of the holes here at Royal Pines."
When Lennarth is not playing on the Ladies European Tour she frequently follows the men's tour where her boyfriend Kristoffer Broberg plays.
"I get to spend a lot of time in warm places where I can practise," she said.
England's Felicity Johnson shot a six-under 67 which was best of the morning rounds. Johnson moved to six under for the tournament.
Joint overnight leader Brooke Henderson made two birdies on the front nine of her afternoon round to be at eight-under while Frenchwoman Marion Ricordeau crashed with a 77 to drop off the leaderboard.
West Australian amateur Hannah Green, 19, continued her recent good form with a 71 to be at four under.