Article continues below advertisementKelly Clarkson has felt "stronger" before.After the sudden passing of her ex-husband, Brandon Blackstock, the pop star is reportedly struggling to find her footing.Article continues below advertisementSource: MEGABrandon Blackstock died from melanoma."[Kelly] feels both a little lost and feels like she has to do everything to make it all make sense," an insider revealed. "This is going to stick with her forever, it will be a long time for her to get back to the jovial Kelly we all know and love.