SpaceX's Crew Dragon has officially entered the International Space Station! SpaceX's Crew Dragon docked at the station19 hours after their liftoff from Florida's Kennedy Space Center. The astronauts Saturday's launch marked the first time US astronauts have been sent into orbit since from US soil since the Space Shuttle Program ended in 2011. This was also the first time that NASA astronauts were sent into space on a rocket built by a private company.

CNN's coverage of this historic moment also gave us some cool insight into the astronauts. According to CNN reporter John Berman, the astronauts listened to AC/DC's "Back in Black" on their way to the rocket!

Caroline Kenny via Twitter

That is pretty badass. You're an astronaut and you can choose anything to listen to and you choose AC/DC's "Back in Black." Who could blame them? That song is iconic. I know for sure many people have that song on playlists to get yourself pumped up. Can you imagine being one of the first US astronauts to fly into orbit from US soil and walking into the rocket to this song? I guess if you have ONE moment to feel like Iron Man, this is it!

This got me thinking: If I were going to space, what song would I use to pump me up as I walked into that rocket? There's lots to choose from. I could try to be like Wolowitz from "Big Bang Theory" and make Elton John's "Rocket Man" happpen. Maybe David Bowie's "Space Oddity" would be cool. Maybe Europe's "The Final Countdown" would be appropriate? I think I would go with Lynyrd Skynyrd's "Free Bird" specifically that part, you know which one.

So, what song would you choose?