Getty Katy Perry's song "Thinking of You" has been getting a lot of love on TikTok in recent months and singer Lizzy McAlpine just covered it during an Instagram Live. A fan reposted a screen recording of the impromptu performance to TikTok and Katy herself watched the clip! In the video, Lizzy began singing along to the standard version of the song, but then started over with the acoustic version instead. Katy commented on the TikTok screen capture. Katy Perry commented! "can someone tell her I want to sing this with her live... and we can sing the acoustics version," Katy wrote.