Casually? I was 12. I had a Wet nWild Purple Eyeshadow Quad and a WnW Frosty Pink Lipstick. This was back when WnW was in the HUGE white packaging with metallic detailing, and I believe I topped it all off with Covergirl's Professional Mascara in the maroon packaging. Yeah. I remember, that stuff.
When I turned fourteen I saved up $180 worth of babysitting money to go to a Clinique counter and have a makeover. I remember they told me to wear Superbalanced Foundation in Porcelain Beige, and I had Air Kiss Lipgloss in Teddy Kiss. I think the lady tried to sell me a lipliner but my mom said no. But I got the whole shebang otherwise. Skincare, foundation, powder, blush, eyeshadow duo, eyeliner, mascara and lipgloss. This was the natural look.
After that it was pretty much drugstore makeup, until I springboarded in makeup at the tenderage of 21 and never looked back. Now its High End all the way, baby!