Fifth Harmony wins Halloween!

If you're not already obsessed with Fifth Harmony, you should probably get on that right this minute. Why? Well, aside from the girls' tight five-part harmonies (as heard in songs like "Miss Movin' On" and "Who Are You?", from their Better Together EP), they really know how to pay homage to their pop predecessors.

For example, this past Tuesday Fifth Harmony dressed up as the Spice Girls for Halloween, AND they performed "Wannabe" at their New York show!

Watch Fifth Harmony perform the Spice Girls' "Wannabe" after the jump.

All dressed up like Baby Spice, Posh Spice, Ginger Spice, Scary Spice, and Sporty Spice, the ladies of Fifth Harmony -- who recently visited MTV to tell the scariest story ever -- demolished their cover of the Spice Girls' 1996 ode to female friendship. And even better? They managed to capture that crazy wordy rap bridge that starts with "So here's the story from A to Z..."

Way to kill the Halloween game, ladies! May we suggest that you dress up as the members of One Direction next year? 'Cause that's probably the only way you're gonna top this gloriously on-point Spice Girls moment.

+ Watch Fifth Harmony perform the Spice Girls' "Wannabe," and see Fifth Harmony tell the scariest Halloween story ever.

Want more Halloween? Check out celebs' Halloween costumes, watch a Throwback Thursday video of Justin Bieber from Halloween 2007, decide which horror movies to watch tonight, and get more spooky stuff on halloween.mtv.com.