Lil Yachty is flexing his pen game.

The Quality Control rapper reveals that he wrote the majority of City Girls’ hit song “Act Up.” During an interview with Kerwin Frost (via XXL), Yachty said that he penned most of the EarlThePearll-produced track aside from J.T.’s final verse.

“When it came out, [people] was so shocked and they didn’t believe it,” he said. “I wrote the whole song except for J.T.’s last verse, but everything that everyone is singing and all, I wrote the whole thing.”

Yachty is listed as one of three writers, along with EarlThePearll and Jatavia “J.T.” Johnson, on the standout track off the duo’s November album Girl Code.

Yachty, who is signed to Quality Control along with City Girls, went on to explain his writing process. “I just thought like them,” added Yachty. “I know them personally and I know what women like to hear. I was like, ‘What’s just some raunchy shit?’ So before I went in the booth, I said, ‘No homo y’all.’ All my boys was in the room. And I started saying crazy shit. But I came out and I was like, ‘Y’all watch, this is about to blow up.'”

“Act Up” continues to blow up the charts. It currently sits at No. 40 on the Billboard Hot 100.