Boggess once again played the role of Christine Daaé in the 25th anniversary concert of The Phantom of the Opera at the Royal Albert Hall in London with Love Never Dies co-star Ramin Karimloo as the Phantom at the Royal Albert Hall on October 1 and 2, 2011.
On January 21, 2013, Boggess returned to the role of Christine in The Phantom of the Opera for the Broadway production's 25th anniversary and co-starred opposite Hugh Panaro as The Phantom.
Following The Phantom of the Opera Boggess began teaching various musical theater master classes and began to workshop an upcoming musical adaptation of the 1998 film Ever After.
However, Boggess was not part of the new musical's world premiere at Papermill Playhouse in 2015.
Sierra has been involved in several productions of The Phantom of the Opera beginning with the Las Vegas production in 2006.
In 2010 she was cast to reimagine the role of Christine Daaé in Phantom's sequel "Love Never Dies".
The musical—which also starred Boggess' former Master Class co-star Tyne Daly—featured direction by David Hyde Pierce.
The show was then temporarily shut down on November 10, 2007 until November 28, 2007, due to the 2007 Broadway stagehand strike.This year, viewers were treated to the sight of Matt Lauer as Humpty Dumpty, Meredith Vieira as Pinocchio, Al Roker as a gingerbread man and Kathie Lee Gifford as the Big Bad Wolf. If you like him, just say it: I Ain't Ashamed of My Man Crush. Scroll down and check out his short and/or medium dark brown hairstyles & haircuts. However the production has been postponed to further notice due to a fire in the Théâtre Mogador, where the show was supposed to be performed.The Théâtre Mogador was only a few blocks away from the Opéra Garnier, where the actual story of The Phantom of the Opera takes place.