You haven't? Well, I'm here to help.
It was led by North Dakota freshman Danny Kristo, a veteran of international play (he's an alum of the Ann Arbor NTDP). Kristo talked to Grand Forks Herald writer Brad Elliott Schlossman, who does a great job covering the Sioux hockey team.
That goes back to when I played on the national team (U.S. Under-17 and 18 teams). Our boxing coach there made up that song. Whenever we had big victories, we sang that song in the locker room. We had a lot of guys from the national team on the (World Junior) team. Before the game, I told the guys that if we win, we’re singing for sure. After we won, someone asked if we were singing tonight and I said you bet we are. It was pretty fun to sing that song one last time. I couldn’t be more happy to win that gold.
Yes, this means the song was somewhat premeditated.
Doesn't change anything, though. It's still awesome, as is what this team was able to accomplish in Saskatoon.