performance from alex trebek. check it out. >> let's rap, kids. buy a chopper and have a doctor on speed dial. i guess, m.a.a.d. city. 6 foot, 7 foot, 8 foot bunch. young money militia and i am the commissioner. panda, panda, panda, panda, panda, panda, panda, panda. i was just getting into this rap thing. >> alex, he looked like a natural. well done to alex trebek. we'll take a serious turn as we check out melbourne, australia. we have been following this story all morning, four americans among those killed when their plane crashed shortly after takeoff. we'll bring you a live report. ♪) ♪ heigh ho heigh ho ♪ ♪ heigh ho heigh ho it's off to work we go here's to all of you early risers, what's up man? go-getters,