A.J. McLean Ryan Gosling Had Better Chops ... Than Justin Timberlake!

EXCLUSIVE

As if Ryan Gosling doesn't have enough going for him -- he's also a better singer than Justin Timberlake ... at least that's what A.J. McLean thinks. 

The Backstreet Boys singer gave us some insider boy band 411 about the rumor Gosling auditioned for a spot in 'N Sync. You gotta hear his comparison of the Mickey Mouse Club alums ... 'cause it's straight up blasphemy, if you're a JT fan.

Also interesting, his memory of a bromantic experience -- watching girl on girl porn with the rest of his BSB group mates ... 'cause they wanted it that way.