KUALA LUMPUR, June 24 -- South Korean music icon Psy has launched his latest K-pop girl group, Baby DONT Cry (BDC), a four-member act he describes not as aiming to be "number one" but "the only ones".

The Hollywood Reporter reported that BDC, made up of Yihyun, Mia, Kumi and Beni, officially debuted yesterday under Psy's label P Nation with the bold and youthful single F Girl, after releasing a pre-debut track Bet You'll Regret It earlier this month.

The track, described as a "baby rock" anthem, is just over two minutes long and has been likened to the kind of song that would soundtrack a teen movie sleepover montage - buzzy, fun and unfiltered.

"F Girl really represents us," said 19-year-old Yihyun, the group's eldest member, in an in...