Before Celine Dion hits the stage at Madison Square Garden as part of her world tour, Rachael heads backstage at her sold-out concert to help this superstar fuel up with minestrone soup and rice pudding. "Did you know that I like cooking?" Celine asks Rachael, who's surprised. "They think I'm starving myself, that I don't eat, that I exercise all the time. It's not true," Celine says. "I'm very energetic; you lose a lot of calories."

Rachael then notes they have something big in common - they both turned 40 this year! While Rachael celebrated on the show, the Grammy-winning singer headed across the globe. "I was in Australia. We had this view all around us on top of the hotel in a restaurant, my friends and family were there, and somebody put together a video for me," she says. "And I could see myself with my newborn and my dad who passed away, so it was very emotional. And I have to tell you that 40 is extraordinary."