Jessica Biel and Justin Timberlake go solo…again but still together?

The groundswell of chatter regarding the shaky connection between Justin Timberlake and Jessica Biel has become so relentless, Justin’s mom has now stepped in to restore some hope of calm.

Justin was seen partying hard — and alone — in Las Vegas this weekend, but Timber-Momma, Lynn Harless, says he’s not up for grabs. “He’s found someone that’ll golf with him, give him a hard time when he deserves it and stand up to him,” the lady told E.

Justin, 28, was in Vegas to act as host for a celebrity golf tournament and a benefit concert to raise funds for the Shriners Hospitals for Children. On hand to help were folks like Alicia Keys, Taylor Swift, Snoop Dogg, TLC, Ciara and Jay Sean.

But once the good deeds got done, JT hit the town — and Jessie was nowhere in sight.

On Wednesday, he had dinner at the Hard Rock Hotel with a group of male friends. After a brief cruise over the Rock’s gaming tables they continued their party at the ‘Wasted Space’ club. Later, Justin joined Kobe Bryant and Lamar Odom at LAX, where they hosted a gig.

“Justin seemed to be having a good time hanging out with old friends,” says one eyewitness.

And while, on the surface, life looks real cool, the word is that JT has told friends he’s already said bye-bye to Biel. Jessica stayed in LA the whole time, and insiders claim she’s already old news. Some say the new headline is soul-singer, Rihanna, but close friends poured scorn on that story as wholly untrue.

So, Momma T says he’s faithful…but what do you think?