Kelly Clarkson shared some BIG news with her fans: She's engaged!

The original "American Idol" and her manager's son, Brandon Blackstock, will tie the knot -- and look at that ring!

"I'M ENGAGED!!!!! I wanted y'all to know!! Happiest night of my life last night! I am so lucky and am with the greatest man ever," the thrilled singer shared on Twitter yesterday.

"It's a yellow canary diamond with diamonds around it and Brandon designed it with Johnathon Arndt," Clarkson says of her new sparkler on her WhoSay account. "They did an amazing job! I can't wait to make Brandon's ring with Johnathon as well!"

Brandon, who has two kids from a previous relationship, also has ties to one of Kelly's famous friends -- he's Reba McEntire's stepson.

Congratulations to the happy couple!

Hot Videos