Married country singers Blake Shelton and Miranda Lambert might not be ready for a child of their own right now, but they're already busy setting up Kelly Clarkson's baby girl to be the next big musical superstar.

Find Out Which Award Show Blake Shelton & Miranda Lambert Won't Be Competing At 

Shelton and Lambert sure had fun playing aunt and uncle this week to fellow artist Kelly Clarkson's four-month-old daughter River Rose. On Tuesday morning Clarkson shared a photo of little River in a pink dress sitting inside a guitar case with her very own full-sized pink guitar.

Blake Shelton Claims There Are 'Too Many Award Shows' In Country Music   

Baby rumors have of course circled Shelton and Lambert since their marriage in 2011, but the couple is thrilled to focus their support on Clarkson, who is a longtime friend. Both Shelton and Lambert are known for being generous when it comes to their friends. Back in May, Lambert gave her Somethin' Bad duet partner Carrie Underwood a motorcycle as a thank you present for all her hard work making the single.

Now that Underwood is expecting her own bundle of joy with NHL husband Mike Fisher in 2015, Lambert and her husband remain one of the last big couples in country music who have yet to start a family.

Tags: Blake Shelton Miranda Lambert celebrity baby