AceShowbiz - There's no trouble in paradise between Gwen Stefani and her husband Blake Shelton. The songstress squashed rumors that they're heading for Splitsville by joining Blake on stage at his concert over the weekend.

Showing support for her husband, Gwen recently made a surprise appearance at the country star's show in Glendale, Arizona. Not stopping there, the couple treated the concert-goers to duet performances of their songs, including "Happy Anywhere", "Nobody But You" as well as their newest single "Purple Irises".

For the occasion, Gwen dressed to the nines in a silver sequined dress and matching knee-high silver boots. The "Hollaback Girl" hitmaker completed her look by pulling back her blonde locks into a high ponytail. Blake, meanwhile, donned a button-up collared shirt, jeans and brown boots.

He additionally took to his Instagram account to share some photos from the concert. "Glendale!!! I love y'all!!!!! Only a couple shows left of the #BackToTheHonkyTonk Tour presented by Kubota!" he wrote in the caption.

Gwen also shared some behind-the-scenes videos from the night. It featured her totally enjoying the show as she filmed herself singing and swaying to her husband's music.

Meanwhile, fans have noticed alleged clues that there could be a rift in their marriage over the last few months. They pointed out that the pair had snubbed each other's projects and written cryptic lyrics. Fans also believed that the two might be facing marital issues as they seemed to be ditching each other for a night out.

A report by Life & Style further fueled the split rumors. A source told the news outlet in February that the couple had been spending time away from each other. "It's been frustrating. Their relationship of late has been a lot of texting and talking on the phone," the insider claimed.