A YouTube video of a 5-year-old sobbing over the thought that her little brother will some day grow up has gone viral and amassed over 4 million views as of Wednesday afternoon. Sadie of Phoenix, Arizona, was in tears over the thought that her infant baby brother Carson won't always stay little. Carson, meanwhile, was all smiles as big sister had her meltdown over him and her own mortality.
Girl Cries Over Baby Brother: "I Want Him to Stay Little"
Updated at 2:39 PM PDT on Wednesday, Jul 30, 2014