The two guest performers on Monday (April 19) night's installment of American Idol are both making "comeback" appearances, fitting in with the theme of the evening as contestants from season 18 in 2020 come back to compete for a slot in the season 19 top 10. Former judge and mentor Harry Connick, Jr. and former contestant Lauren Daigle, both natives of Louisiana, will command the Idol stage with new performances. Connick, Jr. will offer a medley of two songs from his new album, Alone with My Faith, recorded on his own during lockdown. The medley includes the title track and "Old Time Religion." Daigle will sing her 2019 Hot Christian Songs No. 3 hit "Look Up Child."