DANCING WITH THE STARS - "Episode 606" - On week six of "Dancing with the Stars," airing MONDAY, APRIL 21 (8:00-9:32 p.m., ET), seven dance couples remain vying for the chance to be crowned champion of "Dancing with the Stars." (ABC/KELSEY McNEAL) SHANNON ELIZABETH, DEREK HOUGH, KRISTI YAMAGUCHI, MARISSA JARET WINOKUR, MARK BALLAS, TONY DOVOLANI, JASON TAYLOR, MARLEE MATLIN, KARINA SMIRNOFF, FABIAN SANCHEZ, MARIO, CHERYL BURKE, CRISTIçN DE LA FUENTE