<Page> EXHIBIT 99 CERTIFICATION I, Joaquin Blaya, Chief Executive Officer of Radio Unica Corp. (the "Company"), pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, do hereby certify as follows: 1. The quarterly report on Form 10-Q of the Company for the period ended June 30, 2002 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 such Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company. IN WITNESS WHEREOF, I have executed this Certification this 13th day of August, 2002. /s/ Joaquin Blaya ------------------------------------- Joaquin Blaya Chairman and Chief Executive Officer <Page> CERTIFICATION I, Steven E. Dawson, Chief Financial Officer of Radio Unica Corp. (the "Company"), pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, do hereby certify as follows: 1. The quarterly report on Form 10-Q of the Company for the period ended June 30, 2002 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 such Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company. IN WITNESS WHEREOF, I have executed this Certification this 13th day of August, 2002. /s/ Steven E. Dawson -------------------------- Steven E. Dawson Chief Financial Officer