MUSTWORTHINESS She gently sexed up our precious burg of ''Everwood'' as the Ephram-deflowering, raspy-voiced, rock-band-fronting babysitter, Madison. Now she moves west to Sin City as a regular on CBS' Rob Lowe -- Joe Pantoliano drama ''dr. vegas.''
ON HER JAILBAIT LOVE INTEREST ''[Gregory Smith] is actually of age in real life, so I didn't feel so bad about myself.''
YOU ALSO KNOW HER FROM... ''Saved by the Bell: The New Class.'' Lancaster says that when she started at age 14, ''I didn't know how to hit a mark; I didn't know anything about cameras. I didn't know how to act, either, but you'd smile, then they'd line you up like six ducks.''
GAMBLING TIP Her advice after two weeks of casino training to play down-on-her-luck dealer Veronica Harold: ''The house always wins, so don't play,'' she says. ''I'd rather go spend money on shoes.''
NEXT ''dr. vegas'' will air Fridays at 10 p.m. in September.