Lady Gaga performs for Bill Clinton
17 October 2011 Last updated at 13:21 BST
A host of stars, including Lady Gaga, Stevie Wonder, Bono and Usher, performed for Bill Clinton's charity concert in Los Angeles on Saturday.
The former president described being nervous about Lady Gaga's performance, which was said to include a "Marylin moment".
The concert celebrates ten years of the Clinton Foundation.