Randy Jackson goes from judge to performer.
Former Idol winner and country superstar Carrie Underwood shares a laugh with Teri Hatcher.
Brad Pitt shows his giving heart and waves to his adoring, not to mention screaming, fans.
Fergie, in skin-tight leather pants, cartwheeled across the stage during her performance, squashing all pregnancy rumors.
Celine Dion visits a South African orphanage.
Teen idol Miley Cyrus visits with a young girl in Kentucky, showing her support to the charity organization Save the Children.
Paula Abdul puts a smile on a young boy's face as she spends time at Goshen Elementary School in California.
Girl-next-door actress Reese Witherspoon reads to a class at New Orleans CDF Freedom School.
No stranger to charity work, U2 frontman Bono visits with a volunteer in Tanzania.
- Erin Dustin