Dec. 2 (UPI) -- Machine Gun Kelly played a game of Auto-Tune Up on The Tonight Show starring Jimmy Fallon.
The 31-year-old rapper and actor, born Colson Baker, appeared on Wednesday's episode of the NBC late-night show.
During Auto-Tune Up, Kelly and host Jimmy Fallon took turns using auto-tune to liven up random topics.
Kelly performed a song about "a Nextdoor post about crows" and "a Yelp review of a body piercing shop in Idaho," while Fallon sang about "a guide on how to care for a Christmas tree" and "the top trending pet names of 2021."
In the interview, Kelly shared how he bruised his coccyx by attempting to slide down a staircase rail after a beer pong match with rapper Post Malone.
"So I hit the staircase rail and I rode it down. At the bottom of it, I didn't see a giant spike, and it just, you know..." he said. "I was holding it together. It was just -- It was a bad night."
Kelly had recently started dating actress Megan Fox at the time. After bruising his coccyx, he accidentally hurt himself with a knife while trying to impress Fox.
"I was like, 'Oh, check this out. This is sick.' I threw it up, and it came and stuck in my hand," he said. "Then the next morning as soon as she left, I was like, 'Yo, I need stitches real quick.'"
Kelly and Fox confirmed their relationship in June 2020. On Jimmy Kimmel Live! in July, Fox recalled how she and Kelly went on a ayahuasca trip in Costa Rica.