Tim McGraw, George Strait, Rascal Flatts and Alan Jackson -- in that order -- are among America's Top 10 favorite musical acts according to an online Harris Poll of 2,320 adults conducted in early March. Celine Dion led the list, with McGraw charting at No. 5, Strait at No. 7, Rascal Flatts at No. 8 and Jackson tying with Frank Sinatra for the No. 9 berth. In a demographic breakdown of the results, Rascal Flatts ranked highest among single women and people between the ages of 18 and 33. McGraw was tops with respondents from the Midwest. Rounding out the Top 10 were U2 (No. 2), Elvis Presley and the Beatles (tied for No. 3) and Lady GaGa (No. 6).