Faith Hill is relatively private on social media but recently caused a stir when she paid a special tribute to her husband Tim McGraw to mark his 55th birthday.MORE: Faith Hill shares iconic pregnancy photo as she marks special milestoneThe country singer certainly knew how to grab attention when back in May she honored her husband's special day with a steamy photo of the two of them embracing in the bathtub.The couple appear soaking in a large, copper tub, as Tim grasps on to its ledge while his wife is grabbing his face and leaning in for a kiss.WATCH: Faith and Tim's love storyMORE: Faith Hill rocks sequin dress to present impressive award at CMT AwardsHer caption is as sweet as the photo is intimate, starting off with: "Oh, you say it's your birthday Tim McGraw?" and cheekily asking: "Um… What about a date tonight?"She went on to suggestively hint at their plans, writing: "K… see ya later," concluding with a sweet "Love you, too."A post shared by Faith Hill (@faithhill)The steamy photographFans did not hesitate to flood the post with adoring comments, writing: "I'm speechless," and: "You two are one of my favorite celebrity couples!" as well as: "This picture and your words here Faith says it all. Happy birthday to Tim," along with fire and red heart emojis galore.MORE: Tim McGraw and Faith Hill's daughter Audrey showcases her impressive talent in unseen videoMORE: Faith Hill's daughter compared to a mermaid in beautiful beach photoFans of the couple, who have been together since 1996, are never short of heartwarming content from the two, as they have both starred in Paramount's 1883, and the It Matters To Me singer routinely shares behind-the-scenes glimpses from the set.