The Taiwanese Whitney Houston has brought his act to Los Angeles -- along with a personal sweat wiper who toweled him off after a sweltering performance at Dodger Stadium. Lin Yu Chun -- who became a YouTube sensation singing, "I Will Always Love You" -- busted out a song called "Taiwan Will Touch…

Lin Yu Chun -- aka the male, Taiwanese Whitney Houston -- will make his U.S., late night debut on "Lopez Tonight" ... and because everything is better with a little William Shatner, they're doing a duet. The rest of the sure-to-be-epic performance airs tonight at 11PM on TBS.