On the February 12 broadcast of SBS Power FM's 'Cultwo Show,' f(x)'s Amber shared how she was able to get her SM sunbae Girls' Generation's Taeyeon on her single,"Shake that Brass." 

The DJs started the conversation by asking, "We heard that you got Taeyeon to feature. How did you ask her?" 

Amber replied, "I worried a lot over who to get featured on the song. I thought Taeyeon would make a good choice so I personally called Taeyeon unnie to ask her if she could help me. She gave me her consent coolly." 

At this, the DJs asked, "Did Taeyeon not say anything about discussing it with the company?"

Amber replied, "Taeyeon unnie can do whatever she wants," causing laughter on the set. 

In other news, Amber released the MV for "Shake that Brass" featuring Taeyeon earlier today. Her first solo album 'Beautiful' was released online on the 13th and will be released offline on the 16th.