Yet Another Jennifer Aniston-John Mayer Sighting?

Last month, John Mayer complained to fans online about internet speculation that he and 'The Switch' star Jennifer Aniston were back together (yet he never outright denied it). Meanwhile, witnesses continue to spot the former couple hanging out. This weekend, RadarOnline reports that when Mayer gave a concert Wednesday near Atlanta, where Aniston is shooting the Judd Apatow film 'Wanderlust,' the actress quietly slipped backstage in "workout clothes" and a baseball cap for a chat with her ex, and more.

"She looked gorgeous and seemed to be really enjoying herself," a source told Radar. "She and John laughed a lot."

From the site of the Lakewood, Ga., concert, the duo then allegedly decamped -- along with a group of people connected to Mayer's tour -- to a Ritz-Carlton, where Aniston is reportedly staying during the 'Wanderlust' shoot. Radar reports that the famously outspoken musician then rented a suite for a one-night-only private party. Mayer & Co. traveled to Florida the following day for a performance in Tampa.

Aniston, 41, and Mayer, 32, ended their yearlong relationship in 2008. She was spotted last month going out with 'Cougar Town' star Josh Hopkins (the actress will appear as a guest star in an upcoming episode, playing Courtney Cox's therapist), setting off buzz that the two might be getting serious. Several outlets have reported that she's also spent time recently with Lindsay Lohan's ex, restaurant owner Harry Morton.

Nevertheless, fans remain captivated by the possibility that Aniston will reunite with Mayer, especially after this latest sighting in Atlanta.