A TEEN music fan was left confused by the idea that people used to "burn" music onto physical CDs, and it left some of us feeling VERY old.

Before the days of streaming apps, music fans would assemble their favourite tracks onto CDs - a foreign concept to the younger generation these days.

So when a teenager tweeted about the concept of CDs being "burned" it sparked a huge reaction.

She wrote on Twitter: "Maybe it's just the generation Z in me but how did people burn CDs?

"Like how did you just get a blank CD and put songs on it?"

Thankfully one kind user explained the apparently "ancient" process.

However most social media users took the opportunity to point out how old the tweet made them feel.

One jokingly replied: "All my hair turned grey reading this tweet."

Another said: "Part of me wants to explain how I used a blank cassette tape to record songs off the radio when I was a kid but I don't think I'll have time because they've already lowered my casket into the hole and they're shoveling dirt onto me at a truly frightening speed."

A third user wrote: "We would wait for a full moon and throw a blank CD into a giant bonfire and dance around it while chanting the titles of the songs we wanted on it.

"The final product would be sitting on top of the ashes after the flames went out."