It turns out that he’s casually losing himself in the music and the moment, as The New York Times published a profile on the gold medalist, who revealed that his pre-swim playlist includes "a mix of songs from Eminem, Young Jeezy and a more recent addition, Eric Church."
Watch Michael Phelps & U.S. Swim Team's Epic Carpool Karaoke Jam on Justin Bieber, Miley Cyrus & More
The Detroit rapper has been popular among many public figures as of late. President Obama also gets pumped up to Eminem, listening to “Lose Yourself” before his speech at the Democratic National Convention earlier this year.
While we can't confirm what pre-game jam Phelps was listening to before the relay, we're guessing it was Eric Church’s smooth track “Record Year."
Here's a sample of the #MichaelPhelpsFace tweets: