If you have several arrays, how can you randomly choose one of the several arrays?

I'm currently doing a project relating to a music playlist and I need to be able to print the first letter of a specific artist and song for the user to guess however the artist and song must be random. I have made a separate array for each artist and song but I don't know how to randomly select one of these arrays for me to use.

This is my code of arrays:

BTS = ["Idol", "BTS"]

SWIFTY = ["Love Story", "Taylor Swift"]

RUTH = ["Lost Boy", "RuthB"]

ED = ["Perfect", "Ed Sheeran"]

ARIANA = ["No Tears Left To Cry", "Ariana Grande"]

DRAKE = ["In My Feeling", "Drake"]

RICKY = ["La Vida Loca", "Ricky Martin"]

IU = ["BBIBBI", "IU"]

BTS2 = ["Magic Shop", "BTS"]

PSY = ["Gangnam Style", "PSY"]

How can I randomly choose one of these arrays?