The singer delivered her first TV performance in 15 years during the season finale of “American Idol” on May 18. She sang her new track “Blame Me,” before teaming with one of this season’s “Idol” contestants, Josh King, on “These Boots Are Made for Walkin’,” which she recorded in 2005. That song, of course, is a cover of Nancy Sinatra’s 1966 hit.

Only two singers stand between Louisiana's finalist John Foster and the "American Idol" title. The finale will air live from 7 p.m. to 10 p.m. Sunday on ABC. Viewers determine the winner by voting, which is free. Each person can vote up to 30 times — only while the show is airing, typically until the final commercial break.