Blake Shelton: I don't keep secrets from wife

Blake Shelton has "nothing to hide" from his wife Miranda Lambert.

The country stars tied the knot two years ago, but speculation has been rife about their relationship in recent months.

Blake has since opened up about his marriage, declaring there are no secrets between them.

"[I tell Miranda], 'I have nothing to hide from you,'" Blake explained to People.

"[I give Miranda access to my phone if she wants it] That's always been our policy: 'Here's my phone. Go through it'."

The Voice judge continued to explain how the couple make their marriage work. Blake keeps nothing from his wife and is sure this is why they've stayed strong.

"That's really the kind of trust we have," Blake continued. "There are no secrets. [I'll say,] 'Go dig through my drawers or my computer if you feel like you need to.' And that's been a really good thing, because I don't want her to ever have any doubts."

Blake was married to high school sweetheart Kaynette Gern when he got together with Miranda.

Blake and Miranda dated for four years before he proposed, and cheating rumours have recently surfaced online.

The stars have both taken to Twitter with light-hearted messages over the past few weeks laughing off reports of a split.

Days before their May 14 anniversary Blake orchestrated a heartfelt display of his love for Miranda when he turned up at her show unannounced.

The country crooner stunned the crowd at Miranda's Bakersfield, California, concert with a seemingly impromptu appearance.

Radar Online reports the show was nearing its end when Blake came out on stage yelling, "Surprise!"