Ellen is getting the fun started today when she turns the Riff-Raff Room into vacation central! A few months ago, MILEY CYRUS was a mentor on "American Idol," and today she'll share the advice she gave to contestants. And Ellen will find out all about Miley's recent romance! Then, it's not a proper vacation without music, so today Ellen invited a man named JAMES DUPRÉ, who she found on YouTube. She was so impressed, she had to have him here, and he'll give an amazing performance you have to see! And if you're a fan of "Sex and the City," don't miss JOHN CORBETT on the show today.