TMZ's Harvey Levin reveals some celebrities may be concerned over having to testify in Sean "Diddy" Combs' sex trafficking and racketeering trial.

Sean ' Diddy ' Combs is facing the third week of his sex-trafficking and racketeering trial in New York City .

The Diddy trial has picked up momentum, and meanwhile, celebrities are reportedly lawyering up to avoid testifying in the same.

It starts with the march in Philadelphia on June 1; there are also events in Delaware, Chester and Montgomery counties.

During the SoHo House social club meeting in 2012, when, according to Mescudi's earlier testimony, Combs claimed not to know ...