ENTERTAINMENT

* British actress Emma Samms (“Dynasty,” “The Colbys”), who heads the Starlight Foundation, a charity that grants wishes to terminally ill children, has named Puerto Rican pop star Chayanne as its International Youth Ambassador. As part of Starlight’s new Latino outreach program, the 22-year-old singer has taped public-service TV spots in Spanish and English. While in town, Chayanne, whose recent L.A. debut was a success, also appeared at Dionne Warwick’s AIDS benefit concert, sharing the bill with the likes of Stevie Wonder, Kenny Rogers and Prince.

Also performing at Warwick’s star-studded event was Argentine rocker Miguel Mateos, whose new music video and album (“Obsesion”) are receiving plenty of raves from critics and fans. Due to its powerful rock/dance mix and bilingual appeal, Mateos’ label, BMG International, is distributing the release to both the Spanish- and English-speaking markets. Mateos, credited with popularizing Spanish-language rock with Latin audiences in the United States, is touring in Mexico and South and Central America, with his second 1990 U.S. concert tour planned for October.

In the style of the popular “MTV International” TV show (now in its second year), a new Spanish-language radio program has debuted in 25 U.S. cities. Hosted by Panama’s Monica Stagg, “Radio MTV” features music and talk with Latin pop and rock stars. Broadcast via Caballero Radio Network stations across the country, “Radio MTV” airs in Southern California on Sundays from 6 to 8 p.m. on KLVE-FM.

And MTV’s 1990 Video Music Awards is set for Sept. 6 at the Universal Amphitheater. This year’s nominees for Best Latin Music Video are Venezuela’s Franco de Vita (“Louis”), Gloria Estefan (“Oye Mi Canto”), Chile’s Los Prisioneros (“Tren al Sur”) and Argentina’s Soda Stereo (“La Ciudad de la Furia”). Winners are selected through audience voting.

Young fans went wild at Mann’s Plaza Theatre in Westwood during a preview of “Young Guns II” when some of its stars made a surprise appearance. In the film, Emilio Estevez reprises his role as outlaw “Billy the Kid,” once again sharing the screen with Lou Diamond Phillips as Billy’s Indian-and-Mexican buddy. Both actors deliver impressive performances in this sequel of their hit.