SINGAPORE – Keep calm and stay focused.

That is what a Singaporean fan of K-pop boy band BTS, who only wants to be known as Audrey, has been reminding herself.

The 60-year-old retiree knows it will not be easy.

In the days leading up to the South Korean group’s first pre-sale for their Singapore concert tickets on June 3, her home has been filled with the scent of lavender essential oils. She has been diffusing them constantly in a bid to stay relaxed, even joking that after undergoing an angioplasty in May, she probably should not be getting too worked up.

“I know my heart will be beating fast on that day,” she tells The Straits Times.

Like thousands of BTS fans - known as ARMY - across the island, Audrey is already deep in preparation mode and has assembled a small army of family members and fellow fans to help her secure seats for BTS’ Arirang shows at the National Stadium on Dec 17, 19, 20 and 22.

For some, June 3 is only the beginning. Tickets priced between $148 and $388 will be released in four waves: the coveted Weverse ARMY Membership presale on June 3, the Live Nation presale on June 4, as well as the general sale and Klook sale on June 5.

The global travel platform is offering concert bundles from $207 that include guaranteed tickets paired with a one-night s...