Cristian Castro has declared bankruptcy after claiming that his divorce from Valeria Liberman has left him broke.The Latino pop star has told Mexican newspaper El Sol de Mexico, "I'm bankrupt, but not completely penniless, like most people think. Lawyers are expensive in the U.S., and the ones that I have are leaving me high and dry."But the Azul singer insists he's still up for a fight: "We're fighting for the judge to allow me more time with my kids. We know it's difficult, but that's why the lawyers are working so hard, and that's why they cost so much."