Foxx's spokesman said the Oscar-winning star of Ray would host Michael Forever - The Tribute Concert. It is scheduled for October 8.
Christina Aguilera, Smokey Robinson and Cee Lo Green are among the show's announced performers.
The show is not affiliated with Michael Jackson's estate, but Jackson's mother Katherine and other family members are due to attend.
Organisers had to rescind an offer to the band Kiss last month after fans and Jackson's estate noted that singer-bassist Gene Simmons had harshly criticised the pop singer over the years.