John Mayer, Booking Agent Unaware of Ponzi Scheme Ties to 2008 Performance

Lawsuit claims singer was paid $465,000 to sing at a private event and is being sued for '"fraudulent conveyance"

John Mayer is involved in many things, but a Ponzi scheme? Somehow we doubt that one.

Nonetheless, the 34-year-old singer has been named in a lawsuit filed in bankruptcy court in connection with a Ponzi scheme involving investment funds allegedly controlled by Frederick Darren Berg. In January 2008, Mayer was paid to perform at a private meeting planner conference held by Berg's investment companies.

Bob Grabow, booking agent for Mayer, tells E! exclusively that he had no idea that Berg was involved in a Ponzi scheme when he negotiated the deal for Mayer to perform at his private conference in 2008.

"He did a fabulous job on this," Grabow said of Mayer's performance. "It was a private event that he was very successful at."

After Berg's various companies, Meridian Funds, filed bankruptcy proceedings, investors have been seeking to retrieve their money. In July 2012, a lawsuit was filed to obtain $465,000 that was allegedly transferred to Mayer's booking agent in 2007 and 2008. According to the suit filed by Meridian Investors Trust in Washington, the Meridian Funds bankruptcy proceedings arrive from a massive Ponzi scheme perpetrated by Berg. Meridian funds filed for bankruptcy in 2010 and 2011. As part of the bankruptcy trustee's attempt to void certain payments made, Mayer is accused of receiving a "fraudulent conveyance" made by Meridian Funds.

Grabow says his company is just now dealing with these allegations of Berg's Ponzi scheme and adds, "I never even knew anything about this."

"It was five years ago when Berg contacted me," says Grabow. "We did a private event at Paul Allen's place. And it was a very successful event for meeting planners in Seattle."

Grabow adds the event had "nothing to do with any Ponzi schemes or anything" and adds it would "have been impossible to know that he was in the middle of his fraudulent activities."

"We are answering the claims, but it will be clear when it comes out…there is no merit to anything on this," he adds.

As for the $465,000 the lawsuit claims Mayer received, Grabow says "the numbers are incorrect" on that figure, but would not provide any additional figures.