On May 7, Hai Dang Doo and Lou Hoang attracted attention when images and videos with content suspecting these 2 artists using laughing gas in a gathering session spread on the Threads and Facebook platforms.
Both are facing a strong wave of reaction from the online community. On many forums and social networking groups, there are many opinions calling for a boycott, and at the same time proposing that music program and event production units remove the 2 male singers from the guest list.
On the morning of May 8, the organizers of the "Sao Nhap Ngu" concert confirmed that Hai Dang Doo will not continue to participate in the program. On Lou Hoang's side, the male singer also became the focus of criticism and locked his personal TikTok account.

Doing art, talent is one part, but ethics and responsibility to the community are what keeps the audience for a long time. With a symbolic program like "Sao nhập ngũ", the audience demanding the image of a "clean" artist is completely reasonable and logical," a viewer commented.
Support the program to remove Hai Dang Doo from the artist list," another person wrote.
Not stopping there, netizens also mentioned the producer of the program "Tinh Ha say hi" - a new program gathering famous older brothers expected to air in June 2026.
Although the producer announced the official list of brothers, many people have asked them not to invite Hai Dang Doo to participate in the program.
Previously, the incident originated from a post by a girl, in which she shared images inside the hotel room with a status directly mentioning Hai Dang Doo.
From the images in the video, 2 "older brothers say hi" Hai Dang Doo and Lou Hoang were caught up in the noise and "storm" of calls for boycott from the online community.
Hai Dang Doo (real name Do Hai Dang, born in 2000) is a Tiktoker with 3.2 million followers before switching to artistic activities.
This guy once won the Champion title of "The Heroes 2021", participated in the "Hello Brother" season 1 program, but his musical path has not yet created many outstanding imprints.
Meanwhile, Lou Hoang (real name Hoang Kim Long, born in 1994) is a singer and songwriter, known to audiences through songs such as "Counting days away from you", "Beautiful days to say goodbye"...