The two stars take on the roles of the Phantom and Christine, respectively. Read more about it here.
To celebrate, Playbill.com has put together a collection of our favorite performances by Lewis and Boggess.
Lewis performs "I Got Plenty o' Nuttin'" on "The Rosie Show."
Boggess and Ramin Karimloo perform from Phantom.
Lewis performs "Bess, You Is My Woman Now" with Audra McDonald.
Sierra Boggess: "I Have Confidence" from The Sound of Music.
Lewis performs "Stars" from Les Misérables
Sierra Boggess: "Wishing You Were Somehow Here Again."
Lewis and Peter Jöback perform "Anything You Can Do."
Sierra Boggess: "Love Never Dies."
Lewis and Nikki Renée Daniels perform "Wheels of a Dream."
Sierra Boggess: "The Point of No Return."
Lewis performs "We Live on Borrowed Time."
Sierra Boggess: "Part of Your World."
Lewis performs "I Loves You Porgy" with Audra McDonald on "The Rosie Show."
Sierra Boggess: "The Lusty Month of May" from Camelot concert:
Lewis performs "Before the Parade Passes By."
Sierra Boggess: "Love Never Dies" with Lloyd Webber at the piano.
Sierra Boggess: "The Balcony Scene" from West Side Story.
Sierra Boggess: "Falling in Love With Love."
Sierra Boggess: "Something Good" with Rod Gilfry.