Wunderkind chef Josh DeChellis is 35. Blackstone co-founder Pete Peterson is 82. Fashionable art advisor Kim Heirston is 45. Personal finance queen (and power lesbian) Suze Orman is 57. The Post's Andrea Peyser is 49. And Teen Vogue's Amy Astley is nearly a quarter century older than her demo. She's 41 today.