The USTA announced that rising star singer/songwriters Demi Lovato, Colby O'Donis and Menudo will team with tennis superstars Roger Federer, Andy Roddick, Ana Ivanovic, Novak Djokovic and more for the 13th Annual Arthur Ashe Kids' Day. The popular full-day tennis and music festival for children and families - including interactive games, musical entertainment, and tennis clinics - will be hosted by MTV's Susie Castillo and Nickelodeon's Quddus.

The festivities are set for Saturday, Aug. 23 at the USTA Billie Jean King National Tennis Center in Flushing from 9:30 a.m. to 4 p.m. The full-day tennis and music festival kicks off the 2008 US Open, which runs from Aug. 25 to Sept. 7.

From 9:30 a.m. to 1 p.m. kids and families can experience an exciting schedule of interactive tennis games, music and attractions taking place throughout the grounds of the USTA Billie Jean King National Tennis Center. Then from 2 p.m. to 4 p.m., the live tennis and music stadium show will take place.

For the stadium show, tickets are on sale now through Ticketmaster (1-866-OPEN-TIX), usopen.org and at the USTA Billie Jean King National Tennis Center box office. General admission promenade tickets cost $10 and loge tickets are $20.