In the second performance of "Sister Who Makes Wave", Thieu Bao Tram and Duong Hoang Yen performed the song "Not yet forgotten the old lover".
After airing, this performance was discussed on many social networking sites. On YouTube, this performance also had outstanding views - 486 thousand views after more than 2 days.
However, what makes this song get the most attention comes mostly from Thieu Bao Tram's personal story.
In fact, when she was suggested to sing this song, the female singer also admitted: "My heart also ached a little". The person who supported her to sing "Not forgetting the old lover" was Pham Quynh Anh - a senior who has been close to Son Tung M-TP since he first started his career.
The first line Thieu Bao Tram sang "It's been almost three years but I still miss you so much, still can't love anyone, still can't hold anyone's hand" reminded viewers of the noisy old love affair (although never spoken about) between her and Son Tung M-TP.
The X-part (with new lyrics) was also discussed by the audience: "Everyone goes through youth to grow up. Everyone deserves to be loved with understanding. And I hope that we can leave everything in the past. Learn to forgive and each of us will have new happiness."
The love story "going through youth to maturity" is similar to Thieu Bao Tram's old love.
For many years, the female singer was mentioned as Son Tung M-TP's "rumored girlfriend". In 2021, the couple was suspected of breaking up after 8 years together, and rumors of Son Tung's affair had been rife for a long time.
Even My Linh, when talking about Thieu Bao Tram, said that she knew her junior through information and stories shared on social networks.
When talking about the controversies that have surrounded her since her breakup with her ex, Thieu Bao Tram burst into tears and said she had many fears when she returned to the show Sister.

Thieu Bao Tram won with "Never forgot my ex", but the singer's personal life story overshadowed her professional ability and efforts for the performance.
Previously, in the solo round, the 9X singer also got into controversy when performing the song "A Million Reasons", which included the lyrics "Let go of each other, we split up, the passing rain quickly erases".
The lyrics immediately reminded the audience of Son Tung because he has the hits "Con mua ngang qua" and "Buong doi tay nhau ra".
Fans also discovered that on the emergency exit door used as a prop on the stage of "A Million Reasons" there are numbers 7 and 5, and Son Tung was born on July 5.
Therefore, the suspicion that Thieu Bao Tram used her ex-lover to "promote" her name is always mentioned again and again. The controversies make the female singer's performances more viewed and discussed.
Among them, there are many opinions that if that is really an "ex-lover", then it is time for Thieu Bao Tram to forget, to embark on a journey that does not need the name Son Tung M-TP to appear beside her.
Thieu Bao Tram was born in 1994, from Thanh Hoa. In 2013, Thieu Bao Tram and her sister Thieu Bao Trang founded the band Bee.T. They both worked together for 2 years before going solo.
With more than 10 years of working, Tram has many songs loved by the audience such as: "Are you sad alone?", "Who is behind you?"... Her most recent product is "Surely you have suffering", released in 2023.
Despite being active, Thieu Bao Tram's career is still vague and has no personal mark.