Category: Cliches: Cross that ------ when you come to it.?

Questions

What actor mouthed the line "Whatch you talkin' 'bout Willis?"?

Who played Axel Foley's best friend in Detroit??

What was the name of the funky van Scooby Doo and friends rode in??

To what does the obscure song "Turning Japanese" refer??

Which red-head won Star Search and then went on a shopping mall singing tour that took America by storm in 1987 and 1988??