Archuleta will reprise his breakout performance of ‘Imagine’ for Lennon/McCartney week. By Shawn Adler Rihanna Photo: Frank Micelotta/ Getty Images For the second time in three years, “American Idol” contestants are taking on the works of John Lennon and Paul McCartney. This time, they’re doing it with a little help from their friends. Fox announced Monday (April 5) that this week’s results program, airing Wednesday at 9 p.m. ET, will feature performances by Rihanna, singing “Te Amo”; Jason Der
