NEIL DIAMOND receives custom underwear from Ellen and sings "Coming to America" and "Cherry Cherry." FELICITY HUFFMAN ("Desperate Housewives") joins Ellen in the audience and tests fans on their "Desperate Housewives" knowledge. Ellen is the commenc... (more)ement speaker at an unusual graduation! Plus, our good friend and audience member CARL (JAMES BURKE) visits and gets in the hot tub!