Gotta stand up for his sister!
The famous father also rapped that he and the blonde beauty "might still have sex." Ugh.
[Image via Taylor Swift/Instagram.]
The incredibly awesome Keenan Cahill and impossibly adorbs Katy Perry teamed up to give her Teenage Dream the Keenan special treatment!
Check out the video above to see it go down — Katy even had him on stage to dance during her show!
Also, how HIGHlarious is that she gets distracted by how good he smells and immediately forgets the lyrics to her own song! LOLz!
Keep it up Keenan, you're the raddest!