The chart-topping singer hits the stage for a good cause in Las Vegas. Plus: Usher, Katie Holmes, Lauren Conrad and more
Credit: Astrid Stawiarz/Getty
Published: Friday Sep 19, 2008 | 05:10 PM EDT
More from PEOPLE
- First-Time Mom Diagnosed with Deadly Brain Cancer Just Days After Giving Birth: 'I Still Have a Will to Fight and Survive'
- Read the Cover Story: Amy Duggar King: I'm Doing It My Way
- Ben Stiller Reveals His 'Bumped' Super Bowl Commercial – for Female Viagra!
- Affidavit: Johnny Manziel Caused Ex-Girlfriend to Lose Hearing, Threatened to Kill Her and Himself
- VIDEO: Tom Felton and Joseph Fiennes Go Head to Head in Exclusive Clip from Biblical Epic Risen