It feels like everyone is watching the feud unfold between rappers Machine Gun Kelly and Eminem, but while the world is waiting for Eminem's response, MGK's "Rap Devil" track is climbing the charts.

Read more: Is Eminem working on a response to MGK's diss track?

Not long after performing "Rap Devil" live for the first time—and in Eminem's home state no less—MGK took to Twitter to announce his diss track was now available for streaming on all platforms.

Just a few short hours later and "Rap Devil" was sitting at No. 1 on the iTunes U.S. chart.

As of this morning (September 9) "Rap Devil" is still sitting at the top spot on iTunes U.S. chart, the Apple Top 100 U.S. chart and the Apple Hip Hop & Rap U.S. chart while holding the No. 12 spot on the Apple Top 100 U.K. chart.

So far the track has charted in the United States, United Kingdom, Canada and Australia.

The world is still eagerly awaiting for Eminem's response to the diss track, and according to NME, he's already in the studio working on it.

“Right now, he in there working,” Porter, a producer at Em's Shady Records, tells Skoglund16 TV. “We doing something else right now, but trust me, we’ll get to it. I’ll tell you this: I wouldn’t wanna be [Machine Gun Kelly]. It’s great that you took that opportunity and did that, hey, kudos to you, good for you. The one thing that I’m worried about . . . You remember when Thanos threw that whole planet at Iron Man? [It will be like that].”

Have you downloaded MGK's "Rap Devil" track? When do you think we can expect a response from Eminem? Sound off in the comments below!

Watch more: 10 things you didn't know about Machine Gun Kelly