Demi Lovato's Sister Madison De La Garza Mourns Death of Her First Baby - E! Online E! NEWSDemi Lovato's baby niece dies after sister Madison De La Garza undergoes emergency C-section Page SixDemi Lovato's Baby Niece Dies Following Emergency C-Section: 'Grateful I Got to Hold You' AOLDemi Lovato's sister Madison De La Garza grieves loss of daughter after undergoing 'emergency C-section' Daily MailDemi Lovato’s baby niece dies after emergency C-section WJW FOX 8 News Cleveland