The Jonas Brothers and Demi Lovato teamed up for Arthur Ashe Kids' Day. - Gary Gershoff/WireImage.com
"Idol" alum David Archuleta posed with a tennis racket that was practically as big as him! - Gary Gershoff/Wir …
Nick Cannon came down to show his support -- and answer questions about his wife Mariah Carey's rumored pregnancy. …
In addition to taking part in plenty of fun tennis-related activities, kids in attendance got to see exciting matches between professional tennis stars like Roger Federer and Rafael Nadal. But the highlight of the day probably had to be the sold-out live concert, where the JoBros performed "L.A. Baby" for the screaming crowd, and Archuleta sang his new single, "Something 'Bout Love." Check out the clips below!
- David Archuleta
- Demi Lovato
- Arthur Ashe