Over the weekend, the 2026 WATERBOMB Seoul event took place, with a number of performers taking the stage at the summer’s hottest events.
| WATERBOMB
Among the line-up were stars from a variety of generations, including an idol and a singer currently involved in dating rumors.
On July 26, the festival’s third day, WJSN’s Dayoung took the stage to perform several of her most popular songs, including her solo debut, “Body.” The idol is known as a “hot girl,” so this she was perfect for this event.
다영 워터밤 앙콜 body함 ㅜ ㅜ 이뿌고 잘해 #다영 pic.twitter.com/8iGHlIi4Ih
— 포네 (@rryssom) July 26, 2026
The day before, Dayoung took to the stage for a surprise performance alongside Jay Park, one of the event’s headliners. The two performed Jay Park’s “Mommae,” with Dayoung taking center stage to perform part of the choreography.
워터밤 물 좀 더 뿌려줘요! 박재범과 여자 박재범 다영의 ‘몸매’ 합동무대가 너무 핫해서 너무 뜨거워요❤️🔥#WATERBOMB #워터밤서울2026 #JayPark #박재범 #다영 pic.twitter.com/PFPwvk1GnZ
— Waterbomb_Official (@waterbomb_seoul) July 25, 2026
While they shared some moments on stage, it was a post made after her solo performance that captured attention.
Dayoung shared several photos with the older star, showing them in close contact in various poses.
After the photos were posted, many reacted with surprise, with some even calling it a “hard launch,” pointing out the differentm sometimes matching outfits.
THEY LEGIT JUST HARD LAUNCHED OMGGGGGG IM SHAKING pic.twitter.com/Jm9dkm2Dj4
— Jay4sho (@neverletgoh0lic) July 26, 2026
these being taken at different times and them matching. It’s over https://t.co/HcWT9fw6tB
— mikey is BAD (@seobmeal) July 27, 2026
I searched her age and… what did I do so wrong why are we the same age lmao
IS HE ACTUALLY DATING A 99 LINER HELLO!!
ALGUIEN SE COMIÓ MI TORTA https://t.co/R6AHv21h39
— lachaña 🤍 | Angie (@altngie) July 27, 2026
Others commented that it was more likely that the posts were for a collaboration, as Jay’s label reposted them.
bet it’s new project but they look sooo cute omggg pic.twitter.com/VEaEEG0fFK
— ⛅️ (@hicloudysummer) July 26, 2026
Jwalkerz knew exactly that this is project collab. We’ve been date-baited so many times! 😂😂 If you’re a long-time fan, you know Jay might not ever announce anything regarding his private life, like dating, wedding etc 😅 https://t.co/T0V8Iz6oi7
— ⋆˚࿔ Dimps 𝜗𝜚˚ (@dimpsaomghghrMV) July 26, 2026
jay park x dayoung collab?? pic.twitter.com/eo8h3M5tWN
— kimi ⏱️ (@kkkkiiimmi) July 26, 2026