Influencer Britt Horton is honoring brother Caleb after his death. "It doesn't seem possible that there could be a life without you in it 💔," Horton wrote via Instagram on Tuesday, December 2. "Being 18 months apart you were always my little sidekick in life, my best friend, my biggest cheerleader, the one who was always down to do anything with me no matter how big or small, the one I could talk to about anything or nothing, and no matter what you always made me laugh!" She concluded, "You lit up every room always. A piece of me will forever be missing.