Kelly Clarkson's stepdaughter Savannah held baby girl River Rose while sitting on a horse -- see the photo

Just horsin' around! Kelly Clarkson's baby girl River Rose is trying her hand at horseback riding — well, sort of. The American Idol alum's stepdaughter Savannah posed for a picture with the little one while enjoying the outdoor activity on Friday, Nov. 28.

"Big sis posing with little sis during her riding lesson. So stinkin cute :)," Clarkson, 32, captioned the pic. "Big bro nailed his lesson today as well!"

Clarkson kept 5-month-old River bundled up in a furry onesie for the adorable snapshot. Savannah, 13, held on tight while wearing riding gloves and a matching black helmet.

The "Stronger" singer became a mom of two after marrying husband Brandon Blackstock in October 2013. The talent manager is dad to Savannah and son Seth, 7, from a previous relationship. The couple welcomed River in June, but have plans to expand their family even more. Days before her nuptials, Clarkson teased that she couldn't reveal the boy and girl baby names she's picked out. "What if I have four kids?" she said during an interview for Elvis Duran and the Morning Show.