Kendrick Lamar is a Taylor Swift fan. The “i” rapper proved it by singing the pop superstar’s single “Shake It Off.”

During an interview with The FADER at the BACARDÍ Triangle last month, K-Dot sang the lyrics to the hit record off Swift’s No. 1 album 1989, which sold over 1.2 million copies in its first week.

Kendrick was unashamed to admit his love for the song. “I ain’t playin’,” he said. “I say what I mean and I mean what I say.”

Swift shared her love for Kendrick in an interview with Rolling Stone, revealing that she listens to “Backseat Freestyle” when she’s feeling down. “You want to know a trick to immediately go from feeling victimized to feeling awesome?” she said before playing the track off good kid, m.A.A.d city. “This is my go-to.”

Kendrick returned the love. “Shout out to Taylor Swift,” he said. “You can’t put great music in different genres. I enjoy great music outside of my own music all the time, so I definitely can see where she’s coming from when she says that she listens to the record, and it’s a great thing for her to acknowledge that and put that good energy out into the world like that.”

Hear K-Dot croon some T-Swift below.

Taylor celebrated her platinum album sales by singing “Backseat Freestyle” for her 13 million Instagram followers.

But wait, there’s more. While visiting K104 in Dallas, Kendrick spit a freestyle over Taylor’s “Shake It Off” (via HHNM).