Boyz II Men

Green Bay Packers QB Aaron Rodgers needs to "man up" and stop trying to weasel out of the bet he made with Boyz II Men ... this according to NFL Hall of Famer Ronnie Lott.

Lott is no stranger to friendly wagers -- the 49ers legend tells us he used to make similar fun bets with Huey Lewis back in his playing days ... and would always HONOR them when he lost.

And since Aaron lost his bet with B2M -- and should have to wear an Alex Smith 49ers jersey -- Lott tells us the QB needs to pay up soon ... or else it could haunt him later in the season.

“I have a feeling it will bother him the next time he plays the Niners. If they meet again this season, it will bother him.” SF and GB aren't scheduled to play against each other during the regular season -- but many expect them to face off in the NFC Championship game.

Lott tells us he wouldn't be surprised if Boyz II Men gave Rodgers a shot at a "double-or-nothing" bet later this year to clear his debt.

Aaron Rodgers doesn't seem to understand the way bets work -- because even though he LOST a wager to Boyz II Men ... he's now trying to weasel his way out of paying up ... by throwing TMZ under the bus.

We broke the story ... the Green Bay Packers star agreed to a friendly bet with the guys from Boyz II Men -- if he lost to the 49ers, he had to wear an Alex Smith jersey the following week.

Well, the Pack lost ... and Boyz II Men told us they were confident the NFL star would hold up his end of the bargain.

But earlier today, Rodgers addressed the media -- and when he was asked about the wager, he sounded like a man trying to get out of donning his rival's jersey.

"There's nothing to that," Rodgers said ... adding, "That got blown way out of proportion."

Still, Rodgers DID acknowledge a bet was made ... saying, "It was at best a joke between friends, and, unfortunately, the great reporting of TMZ blew another one."

What did we blow? You made a bet ... you lost ... now you're not living up to it.

In fact, check out the tweet Boyz II Men posted in the final minutes of Sunday's game ... which reads, "Pressing the jersey now!"

Aaron Rodgers has a date with a 49ers jersey after losing a bet with the guys from Boyz II Men ... but the singers tell TMZ, they're willing to give him some time to prepare himself to pay up.

Singer Nathan Morris tells us, “Green Bay has another huge game [against the Bears] in 3 days so ... we understand where his head is, so I know he's focusing on that game.”

According to Nathan, Aaron promised to post the pic of himself wearing a 49ers jersey on his Twitter account if he lost against San Francisco ... which he did yesterday ... 30-22.

Nathan -- the biggest 49ers fan in the group -- is confident Aaron will hold up his end of the bargain, telling us, "Aaron might be one of the classiest guys we know.”

Green Bay Packers QB Aaron Rodgers has agreed to a deal that could land him in a 49ers jersey on Monday morning ... and it's all thanks to the guys from Boyz II Men.

TMZ has learned ... Rodgers and the R&B legends are actually friends ... and recently, Aaron asked the guys if they would sing the National Anthem at the season opener at Lambeau Field on Sunday.

But before the guys would agree to sing, Nathan Morris (the guy with the deep voice) had one MAJOR demand.

Turns out, Morris is a bigtime 49ers fan ... and proposed a friendly bet to the QB -- if SF wins, Rodgers MUST WEAR an Alex Smith 49ers jersey for the remainder of the week.

If GB wins, Morris has agreed to wear a Rodgers jersey.

A rep for the band confirms ... Aaron accepted the challenge and Boyz II Men agreed to perform at the game.

The stakes are pretty damn high for Rodgers -- considering SF passed on Aaron in the 2005 NFL Draft so they could pick up Alex Smith.

Plus, the Niners and the Pack are both considered NFC favorites this season.

So, we gotta ask ...

So there he was ... Charles Barkley MURDERING a karaoke rendition of "End of the Road" at a bar in North Carolina ... when suddenly the guys from Boyz II Men appeared on stage and saved his ass.

It all went down at a bar in Raleigh -- Charles and B2M were in town for the Jimmy V Celebrity Golf Classic to raise money for cancer research.

After Charles hit the links, he grabbed the mic during a karaoke event ... and proved once and for all that his voice is EVEN WORSE than his golf swing.

But just when the crowd at Lucky B's couldn't take any more ... Boyz II Men emerged from the crowd, and blew everyone away.

All original members of '90s boy band Boyz ll Men (Shawn Stockman, Michael McCary, Nathan Morris and Wanya Morris) came together to get their star on the Hollywood Walk of Fame on Thursday.

Question is ...