Kelly Clarkson Engaged
"I'M ENGAGED!!!!!," Clarkson wrote. "I wanted y'all to know!! Happiest night of my life last night! I am so lucky and am with the greatest man ever :)"
Blackstock is the son of Clarkson's manager Narvel Blackstock and the stepson of Reba McEntire. The couple have been together since late 2011.
This will be the first marriage for Clarkson and the second for Blackstock, who has two children from a previous marriage.