The singer-songwriter revealed in an interview with People that, way back in 2008, he met Bieber and Scooter Braun and offered to bring JB onto his record label ... but first, he said he had to pull out a thicker wad of cash than Timberlake.

Usher said he also used Timberlake's name against him, telling Justin that -- if he went with Usher -- he'd be the only Justin around.

Seems like the war didn't get too contentious ... Usher doesn't say anything negative about Timberlake in the interview -- and actually compliments the guy tons.

Usher said he and Justin are both unique artists, and he loves the producers Timberlake chooses to work with ... adding he even wants to collaborate on an album with the former *NSYNC star.

He finished off by saying he's motivated by people like Timberlake who "should be recognized for who he is and what his contribution has been."

Of course, Usher was recognized for his contribution to music by headlining the Super Bowl Halftime show ... one which his protege decided to skip out on.

We broke the story ... Usher reached out to Bieber directly to get him to join him for his big performance -- but, while Alicia Keys, Ludacris and Lil Jon all hopped onstage with him, Justin decided to sit in his suite and spectate.

No bad blood between the two though ... 'cause Usher said in an interview earlier this week that "he's just wanting to tell a different story right now, and I understand that."