Currently, there are 9 guest singers announced at the live concert "Co doi lan" including: Phuong Thanh, Ho Quynh Huong, Ho Ngoc Ha, Le Hieu, Lan Nha, Thuy Chi, Van Mai Huong, Trung Quan, Anh Tu.
There is also a secret guest name that will be kept secret until the concert takes place.
Even though Phuong Thanh is busy with her filming schedule, she still goes to the practice room to record a demo of the new song Duc Tri gave her.

In addition to performing her one-time hits such as Khi giac mo ve, Ta chang con ai, Phuong Thanh was also assigned a new song by musician Duc Tri (kept secret until the live concert).
Present at the practice session with a professional demeanor, Ho Ngoc Ha proactively sat next to Duc Tri, promising a duet between her and the male musician.

During practice, she and musician Duc Tri also frankly gave comments and pointed out points that needed to be improved to make the performance smoother.
Ho Ngoc Ha was also professional, attentively hand-copying Duc Tri's comments and the more she practiced, the more her singing voice improved.

Van Mai Huong was specially asked by musician Duc Tri to sing a very difficult "secret" song, a recording of which has never been released.
Live concert "Co doi lan" by musician Duc Tri will take place on October 5 in Ho Chi Minh City.