You won't believe the voice of 12-year-old RHAP SALAZAR. Ellen saw a YouTube video of his singing and it blew her away. She's flying him in all the way from the Philippines. Then, Ellen has helped DWAYNE JOHNSON get over his fear of tarantulas, and last time they worked on his fear of roller coasters. When he's here to talk about his movie "Planet 51," she'll see if there's anything else we can work on. Just call her Dr. Ellen. Also, with the amount that BRIAN WILLIAMS travels the world while hosting "NBC Nightly News," Ellen is thrilled that he's taking the time to be on the show today. He is a funny guy and it's always great to have him here. Ellen hear he's a fan of pranks, too. Will he still be a fan if the prank is on him? There's only one way to find out! Also, you never know who else may drop by the show today, so don't miss it!