UK singer Sam Smith has been of 2014's most unlikely success stories. In an era of pop star shock tactics, Smith has become famous at home and here across the pond thanks exclusively to the power of his falsetto.

But just in case you thought his breakthrough ballad "Stay With Me" was a fluke, Smith is here to prove we will be listening to his voice for years to come with this heartrending, piano-only cover of Whitney Houston's classic "How Will I Know."

It's certainly the best Houston cover I've ever heard, and just to put it into perspective below we've included the isolated vocal track version of the original.

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  • How Will I... Vocal

  • Adele - Rumor Has It (Studio Acapella)

  • Justin Timberlake - Suit & Tie ft. JAY Z + DL (Studio Acapella)

  • Michael Jackson - Beat It (Vocal Track)

  • Nirvana "Smells Like Teen Spirit" Isolated Vocals

  • Rolling Stones - "Gimme Shelter" (Isolated Vocal Track)

  • Bruno Mars - Grenade (Studio Acapella)

  • David Bowie - Space Oddity (Lead Vocal Track)

  • Amy Winehouse - Rehab (studio acapella)

  • Led Zeppelin - Ramble On Main Vocal Track Isolated

  • Queen "Somebody To Love" Isolated Vocals

  • Beach Boys: God Only Knows (Vocal Only)

  • Radiohead "Creep" (Isolated Vocal Track)

  • The Beatles - Come Together isolated vocals, vocals only

  • Adele - Rolling In The Deep (Studio Acapella)

  • Jackson 5 - ABC (vocals only) -- Michael Jackson at age 11!

  • david lee roth running with the devil (vocals only) 1978

  • David Bowie (and Freddie Mercury) - Under Pressure (Vocal Track)

  • Helter Skelter - Paul Vocal Only

  • Marvin Gaye - I Heard It Through The Grapevine (A capella)

  • Rush — Closer to the Heart, isolated vocal track

  • Oasis - Wonderwall - Vocals Only

  • The Ronettes - Baby I Love You (Isolated Vocals)

  • Pearl Jam - Jeremy (vocals only)

  • Kelly Clarkson - Stronger (Studio Acapella)

  • Justin Timberlake- What Comes around, goes around (acapella)

  • Somebody I Used To Know - Studio Acapella

  • One Direction - What Makes You Beautiful (STUDIO ACAPELLA)

  • Destiny's Child - Survivor (Acapella)

  • Blondie - Heart Of Glass - Studio Acapella

  • Fun. - We Are Young (Studio Acapella)

  • Green Day - Boulevard of Broken Dreams (Official Acapella)

  • Beyonce-Irreplaceable (Acapella)

  • soul II soul back to life acapella

  • Soundgarden - Black Hole Sun (Vocals Only)