Garth Brooks and Trisha YearwoodGarth Brooks took time out from signing autographs, posing for photographs and performing at the Points of Light Foundation's March 21 celebration in Washington, D.C., to offer advice to engaged couple Blake Shelton and Miranda Lambert on the secrets to a happy marriage.

Brooks and Trisha Yearwood just celebrated their fifth wedding anniversary back in December.

"If you are going to talk to anybody about anything, talk to your spouse," Brooks tells The Boot. "That's it. No matter what. Even if it's about your spouse, it's all about communication. That's the secret."

Another secret Yearwood shared is that when she and Brooks married they made a vow to cherish his teenage daughters Taylor, August and Allie. The five of them always celebrate Garth and Trisha's wedding anniversary together.