Getty Katharine McPhee is showing her full support for Spencer Pratt in the Los Angeles mayoral race. The 42-year-old singer and American Idol alum was joined by her husband, David Foster, to perform at a campaign fundraiser for Pratt. Katharine changed the words to the Tina Turner song "The Best" to be about Spencer's run for mayor. She also called out his opponents, current mayor Karen Bass and City Councilmember Nithya Raman.