Tiffani Thiessen reflected on aging ahead of her 50th birthday in January. During an appearance Friday on the "Good Instincts" podcast, the 49-year-old actress shared her thoughts on whether she feels pressure to "not age" and continue to appear how she looked when she first rose to fame as a teenager on the hit show "Saved by the Bell." "I feel so much more at ease now than I was even ten years ago," the California native told podcast host and celebrity nutritionist Shira Barlow. "And I don't know why.