Kanye West Did Not Get Backstreet Boys' Approval for New 'Everybody' Single

1:52 PM PT -- We should note ... the version Kanye West appears to have played in the Miami club featured other voices singing the chorus, so it's possible he can get away with it through a loophole.

Kanye West's new take on the Backstreet Boys' hit "Everybody" has been getting a ton of buzz, but there's one massive problem ... Ye never cleared it with the boy band.

Sources connected to BSB tell TMZ Kanye failed to get the collective OK from Nick, Kevin, Howie, Brian, A.J. and their team to use the 1997 classic.

In Kanye's version, you can hear the original song and chorus before Ty Dolla Sign takes over, singing the original lyrics from "Everybody."

Of course, not clearing the song creates an interesting challenge for Kanye considering he's supposed to release his album this week and the song is a listed track. Not to mention, he's played it out in public in Miami, promoted it on social media and pumped it through the speakers at his album listening event in Miami Monday night.

So by all counts ... it seemed like Kanye was planning to have it on his "Vultures" album.

We don't know if Kanye reached out and was denied usage of the track or whether he just never asked at all ... but either way, it ain't good for Ye.

Kanye's been the center of controversy for months, with his antisemitic remarks -- expressing his love for Hitler -- and dangerous social media rants. As we reported, Ye wore a black KKK-style hood Monday night at his public event.

Obviously, a lot of artists have distanced themselves from Kanye ... and it'll be interesting to see his chances of locking down clearance for additional tracks in the future.