Exhibit 99.3


                    CERTIFICATION PURSUANT TO
         18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
          SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In  connection  with  the Quarterly Report of  Viacom  Inc.  (the
"Company")  on Form 10-Q for the period ending June 30,  2002  as
filed with the Securities and Exchange Commission (the "Report"),
I,  Sumner  M. Redstone, Chief Executive Officer of the  Company,
certify that to my knowledge:


     1.   the Report fully complies with the requirements of section
          13(a) or 15(d) of the Securities Exchange Act of 1934; and

    2.   the information contained in the Report fairly presents, in
         all material respects, the financial condition and results of
         operations of the Company.



/s/ Sumner M. Redstone
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Sumner M. Redstone
August 14, 2002