Article continues below advertisementBrandon Blackstock had a secret significant other prior to his death at age 48.An obituary published on Tuesday, August 12, revealed the talent manager had been in a relationship with a woman named Brittney Marie Jones - who previously worked for his ex-wife, Kelly Clarkson, as her assistant.Blackstock and Jones had reportedly settled down together in Montana, where he founded the local Valley View Rodeo and lived a more private and peaceful life away from Hollywood.