On the season finale of Ashlee + Evan, the older Simpson sister was thrilled to support Ashlee and Evan Ross as they debuted their new music.
"I'm so excited," Jessica, 38, said to her sister who was suffering from some serious stage fright. "At least you don't have choreography."
"I'm so happy you came," Ashlee, 34, told Jessica. "It means the world to me. I can't wait for your show next."
"Oh Lord, I'm stalling," a very pregnant Jessica told her younger sis.
"I feel like we've been wanting to do a duet," Ashlee told Jessica, who recalled: "I feel like that was the last time I was on stage, when we did our Christmas thing. Seven years ago."
Ashlee then took some time to gush about Jessica.
"My sister and I have a really cool relationship," she said. "We've always supported each other through everything that we've done. She's never missed one of my first shows."
She also admitted that while having family in the audience calms her nerves, she also realizes she has large shoes to fill with Jessica as a big sister.
"She definitely gives me a confidence, but it feels like it might have been easier in front of a bunch of strangers," Ashlee continued.
Feeling emotional, Ashlee then confessed to her mother that she struggled with an eating disorder when she was younger.
"You guys didn't know I was eating like a Nutri-grain bar a day," she said, recalling her time in ballet school.
"I didn't look at myself and think I was fat, I wanted to be a prima ballerina," she told Tina Simpson. "You're under all this scrutiny. You have to be strong."
Ashlee also confessed that she was afraid to perform again.
"One mistake can make a huge impact on your career. I've never had anything to happen to me like that lovely moment on SNL but when I'm going to perform that's definitely on my mind, she said. Soon, however, she got over her fears and took the stage with her hubby.
"I'm unbelievably proud of Ashlee," Ross said about his wife. "To watch her dive it, it was amazing. I think when you find somebody that matters that much to you it happens one time. If it does happen to you."
The show ended with the whole family celebrating their musical duet debut.
Stay with Radar for weekly recaps of Ashlee + Evan.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.