Watch : Katy Perry Calls Boyfriend Justin Trudeau "Love of My Life"When it comes to parenting their children, Katy Perry, Orlando Bloom and Miranda Kerr are never hot n cold. Instead, with Flynn—Bloom's 15-year-old son with former wife Kerr—and Daisy (his 5-year-old daughter with ex-fiancée Perry), they're just like twins, so in sync. The key is to quite simply "put the needs of the child first," Kora Organics founder Kerr explained to E! News at the Environmental Working Group’s Know Your Worth Earth Day Dinner April 22. "That's so important to think about, is this in the best interest for the child?"