"I'm on my laptop on a little four-day vacation in Mexico," Lambert tells Billboard, "and I open up my iTunes, I'm searching through, and I'm like, Oh, Madonna's music is out! I love Madonna! I've always loved Madonna -- she's an icon, she's an amazing entertainer. And I see on the track listing a song called 'Ghosttown.' And I thought, What are the chances? What is the hell is going on here?"

At first, Lambert panicked a little. "My reaction was so complicated," he says, "because I think I texted my management, like, 'Did you see this? Did you see this? What are we gonna do?' And they said, 'You know, it's fine because the songs are so different.'

"Hers is like a post-apocalyptic love song, mid-tempo, and mine's like an existential dance goth rave thing. So they're two different songs - they just share a title." Read more and watch videos for both songs - here.

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