Namewee, whose real name is Wee Meng Chee, handed himself over to police on Wednesday after he was named a "person of interest" in the probe into the death of Iris Hsieh, also known as Hsieh Yu-hsin, or "nurse goddess" to fans.
The 31-year-old influencer was found dead on Oct. 22 in a bathtub at a high-end hotel in the Malaysian capital.
The probe was reclassified from a "sudden death report" to a murder case, with police saying they wanted to question Namewee, believed to have been the last person in Hsieh's company.
Namewee, 42, has denied any wrongdoing and said in an Instagram post earlier this month that "the truth will speak for itself."
His lawyer, Joshua Tay, told AFP that "the investigation is still ongoing and this is why the police is asking for an extension of the remand," which he said the court granted for another three days.
Namewee, an outspoken hip-hop artist, actor and filmmaker, is hugely popular in mainland China and Taiwan. He sings mainly in Mandarin.