Courteney Cox and David Arquette and lesbians Ellen Degeneres and Portia De Rossi have landed on a new Hollywood TV Power Couples list. The starry pairs join High School Musical lovers Zac Efron and Vanessa Hudgens, Kevin Bacon and Kyra Sedgwick and William H. MACy and Felicity Huffman on U.S. magazine TV Guide's new power pack top 10.