Birthday Trivia

So, i mentioned in my last post that my birthday also zoomed by us a week or so ago....so here's my trivia question: How old am I?

I'll leave these four songs as a clue (you can buy all these albums here):

Nirvana - Scentless Apprentice

Jimi Hendrix - Castles Made of Sand

Janis Joplin - Ball and Chain (live)

The Doors - Riders on the Storm

Should be an easy one.....

RR