Three of our fave new artists -- Demi Lovato, Colby O'Donis, and Menudo -- are scheduled to rock out at the 13th annual Arthur Ashe Kids' Day presented by Hess on Saturday, August 23 at USTA Billie Jean King National Tennis Center in New York. Besides the concert, there will be interactive games, tennis clinics, appearances by tennis pros Andy Roddick, Ana Ivanovic, Roger Federer, and Novak Djokovic, and more to kick off the 2008 US Open, which runs from August 25 until September 7. Tickets for the stadium show are available through Ticketmaster. Alloy will be there...will you?