Blake Shelton, Gwen Stefani's Relationship Going Strong Amid Miranda Lambert Surprise Wedding [PHOTOS]

Gwen Stefani and Blake Shelton's relationship is going strong. The singer recently showed her "boo" a lot of love on social media in a sweet Valentine's Day tribute.

On Instagram, Stefani shared a set of photos of herself and Shelton to celebrate the day of love. One snap featured her and the country singer dressed down and with messy hair, goofing off in front of the camera. Stefani also posted a photo of a dessert with the message "Gwen Loves Blake" written in icing on top. The third pic from the set shows Stefani stealing a glance at Shelton, who is smirking at the camera.

In her caption, Stefani called Shelton her "favorite."

This wasn't the No Doubt singer's only Valentine's tribute for the mainstay "Voice" coach. Stefani also shared another post that showed Shelton's sweet surprise for her that day.

In the clip she posted earlier this week, Stefani showed off the flowers she received from her boyfriend, as well as the sweet note he wrote for her. Unfortunately, the lovers couldn't spend the day together as, according to her caption, Shelton kicked off his "Friends and Heroes" tour in Oklahoma on Feb. 14. She also said that she wished she was there at Shelton's concert, which means she couldn't go and see his show.

"Wishing my boo @blakeshelton the best wishes and kisses on valentines as he kicks off his first date of #friendsandheroestour in #Oklahoma tonight #loveu #wishwewerethere gx," Stefani captioned the sweet post.

Meanwhile, some tabloids reported that Shelton and Stefani had gotten engaged on Valentine's Day. Stefani's rep, however, confirmed with Gossip Cop that there is absolutely no truth to those rumors. And as seen on Stefani's post, her Valentine's Day surprise from Shelton didn't include an engagement ring.

Unlike Shelton, though, his ex-wife Miranda Lambert has decided to take her relationship with her new beau to the next level.

Lambert announced that she secretly married Brendan McLoughlin, and the newlyweds were recently spotted showing off their bands in New York City.

An onlooker told People that Lambert and her new husband looked "happy and natural holding hands" as they strolled along the sidewalk and stopped to look in windows. "She was beaming and protectively holding her ring finger," the witness said of the country singer.