Like most other sisters, Jessica and Ashlee Simpson have experienced their fair share of personal setbacks. But unlike most other sisters, they've gone through it all in front of millions of people. Even with the pressure — and, sometimes, public backlash — they've continued to support each other.

One early blunder came when Ashlee performed on "Saturday Night Live" in 2004 and was caught lip-syncing, perhaps making it one of the most notable live performance bloopers of all time. Big sis Jessica was quick to defend Ashlee after the mistake. "Ashlee is an amazingly talented person and the fact that people are calling her 'Milli Vanilli' is absolutely obscene and ridiculous," Jessica told Access Hollywood (via Digital Spy). "She's already sold three million records which is more than I sold in two years. She's proved herself."

Fast-forward a few years to 2009 when Jessica was the subject of some brutal body-shaming in the press. According to TV Guide, Ashlee responded to her sister's bullies in a now-deleted blog post, saying, "I am completely disgusted by the headlines concerning my sister's weight . . . All women come in different shapes, sizes, and forms and just because you're a celebrity, there shouldn't be a different standard." Even after their 2000s spotlight started to dim, they continued to be there for each other. For instance, when Ashlee divorced Pete Wentz in 2011, she reportedly stayed at Jessica's house for emotional support (via Independent).