LAS VEGAS - OCTOBER 15: Singer Donna Summer performs during the David Foster and Friends concert at the Mandalay Bay Events Center October 15, 2010 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS - OCTOBER 15: Singer Donna Summer performs during the David Foster and Friends concert at the Mandalay Bay Events Center October 15, 2010 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)