I don't understand the word order of 'No.2 Hot 100 best'. Could you explain the structure of this phrase?

Rebecca

The "Hot 100 best" is the name of a song chart with the current most popular songs throughout the world. "No. 2" indicates that the song is number 2 on the "Hot 100 best" list. The "No.2 Hot 100 best" is used to indicate that the song Gangnam style was no.2 on the list.