Mariah Carey is late for a very important date. Mimi's tour manager Yoni makes a big mistake and forgets to mention a crucial detail in this Mariah's World sneak peek as the pop star travels from London to Luxembourg for a concert stop. Mariah's manager Stella Bulochnikov is a little worried when they land because they only have 55 minutes left before show time?that is until Yoni drops a bombshell! "It's 9:15 here," he responds. "Please tell me that she's not supposed to be onstage 15 minutes ago," Stella pleads.