Madonna

Singer Madonna attends a Gucci UNICEF dinner at The Oak Room at the Plaza on Wednesday, Nov. 19, 2008 in New York. (AP Photo/Evan Agostini)

AP

Singers Madonna, left, looks at Rihanna as they attend a Gucci UNICEF dinner at The Oak Room at the Plaza on Wednesday, Nov. 19, 2008 in New York. (AP Photo/Evan Agostini)

AP

From left, Gucci Creative Director Frida Giannini, Madonna and Rihanna attend a Gucci UNICEF dinner at The Oak Room at the Plaza on Wednesday, Nov. 19, 2008 in New York. (AP Photo/Evan Agostini)

AP

Singer Madonna and Gucci Creative Director Frida Giannini attend a Gucci UNICEF dinner at The Oak Room at the Plaza on Wednesday, Nov. 19, 2008 in New York. (AP Photo/Evan Agostini)

AP

Singer Madonna and Gucci Creative Director Frida Giannini attend a Gucci UNICEF dinner at The Oak Room at the Plaza on Wednesday, Nov. 19, 2008 in New York. (AP Photo/Evan Agostini)

AP

Madonna and Rihanna attend the launch of the Tattoo Heart Collection to Benefit UNICEF dinner at The Plaza on November 19, 2008 in New York City..Gucci Launches the Tattoo Heart Collection to Benefit UNICEF - Dinner.The Plaza.New York, NY United States.November 19, 2008.Photo by Theo Wargo/WireImage.com..To license this image (16160653), contact WireImage.com

WireImage.com

Madonna attends the launch of the Tattoo Heart Collection to Benefit UNICEF dinner at The Plaza on November 19, 2008 in New York City..Gucci Launches the Tattoo Heart Collection to Benefit UNICEF - Dinner.The Plaza.New York, NY United States.November 19, 2008.Photo by Theo Wargo/WireImage.com..To license this image (16160647), contact WireImage.com

WireImage.com

Madonna attends the launch of the Tattoo Heart Collection to Benefit UNICEF dinner at The Plaza on November 19, 2008 in New York City..Gucci Launches the Tattoo Heart Collection to Benefit UNICEF - Dinner.The Plaza.New York, NY United States.November 19, 2008.Photo by Theo Wargo/WireImage.com..To license this image (16160642), contact WireImage.com

WireImage.com

Madonna performs during her "Sticky & Sweet Tour" at Ford Field in Detroit, Tuesday, Nov. 18, 2008. (AP Photo/Carlos Osorio)

AP

Madonna performs during her "Sticky & Sweet Tour" at Ford Field in Detroit, Tuesday, Nov. 18, 2008. (AP Photo/Carlos Osorio)

AP