According to Suzy, the key was to smile and only slightly show your top teeth rather than smiling widely.

Your browser does not support video.Suzy teaches Jo Hyunah how to do the flirting smile. | Jo Hyunah’s Thursday Night/YouTube

She admitted you might look a bit foolish doing the smile, but netizens and Jo Hyunah agreed that it only worked because Suzy was doing it.

However, this “Suzy” smile became a trend, with netizens and influencers trying it out. TikTok influencer Jooshica explained the viral trend and did her version of it, asking netizens if the smile was working.

@jooshica

IT LOOKS WEIRD #fyp #korean

♬ Funny Song – Funny Song Studio & Sounds Reel

Some netizens tried it themselves and left hilarious comments about their outcomes.

| @jooshica/TikTok

Even American singer and actress Selena Gomez has attempted the flirting smile!

Jooshica recently met with Selena Gomez and taught her about the viral trend in Korea.

There’s a saying that if you do this smile, everyone’s going to fall in love with you.

— Jooshica

Selena Gomez (left) and Jooshica (right) | @jooshica/TikTok

Jooshica first demonstrated the smile…

| @jooshica/TikTok

…then Selena Gomez tried it out herself.

| @jooshica/TikTok

She laughed and said she looked a little concerned but tried again with more confidence.

| @jooshica/TikTok

Jooshica wrote in the caption, “SHE ATE,” and some netizens agreed. More than the cute bunny-like smile that Suzy originally introduced, Selena Gomez did it in her own way with a more model-like expression.

Watch Selena Gomez’s flirting smile here.

@jooshica

SHE ATE #fyp #korean #rarebeauty

♬ Funny Song – Funny Song Studio & Sounds Reel