Los Angeles Mayor Antonio Villaraigosa and urban group Calle 13 were surprise guests Wednesday night at the Premios de la Radio at L.A.'s Gibson Amphitheatre.

The annual regional Mexican awards show is presented by Liberman Broadcasting's La Que Buena 105.5/94.3 FM and was broadcast live for the first time on the broadcaster's Channel 62 television station in L.A. It will be re-broadcast on Liberman's other TV stations in the U.S.

Mayor Villaraigosa came to honor the radio station's influential program director, Pepe Garza, and was onstage when Garza was presented with a plaque from Las Vegas' Walk of Stars. Garza will be the first radio personality to receive a star on the Las Vegas Strip.

Calle 13 joined La Que Buena morning host Don Cheto for a performance of "Pa'l Norte," a song by the urban duo that that the station had re-mixed in a version with Don Cheto. The radio personality rapped his part and Calle 13's rapper Residente donned a cowboy hat for the performance.

Jenni Rivera won for Best Female Soloist, Los Inquietos del Norte won best Norteño group, and La Arrolladora Banda el Limon won best banda. Best Norteño song went to Los Rieleros del Norte's "A Punto de Llorar," best corrido went to El Tigrillo Palma's "El Basucazo," best banda song went to Dareyes de la Sierra's "Hasta el Dia de Hoy," and best Duranguense song went to Alacranes Musical's "Dame Tu Amor." The award for most handsome artist went to Andres Marquez "El Macizo."