The pop star also opened up about her rough divorce from Gavin Rossdale.
For Gwen, the special interaction was exactly what the truth feels like: powerful and uplifting.
Shelton admitted his feelings for Stefani grew from an unlikely place.
Gwen Stefani revealed that she doesn't think she's that great of a singer, and that Prince thought Jennifer Lopez was her competition.
'Why did I get so unlucky in love?' Stefani said through tears during an interview with Howard Stern.
Shelton said he was just 'trying to pick the pieces up from being at the rock bottom and then trying to moving forward' when he and Gwen Stefani became a couple.
The tribute track features over two dozen pop stars, as well as the Trans Chorus of Los Angeles.
From construction zones to orgies to some casual stalking in one's bra and panties (who hasn't?), 2016 has served up some bountiful feasts for the eyeballs.
The country star turned 40 on June 18, and he celebrated with a live duet of his collaboration with Gwen Stefani, 'Go Ahead and Break My Heart.'
Gwen Stefani's upcoming tour isn't exactly, uh...selling out.