The death of Leslie Carter remains unknown, pending a medical examiner's findings, as brothers Nick and Aaron Carter mourn this surprising and tragic loss.
The Erie County (N.Y.) Medical Examiner's Office is investigating, but, so far there has been no word on the cause of her passing. Leslie Carter was just 25.
Sadly, the family itself is for now as in the dark as their well-wishers, with a source close to the Carters calling the death as "mysterious" as it was abrupt.
Leslie Carter (right, 1986-2012) with her family.
Aaron Carter, currently starring in the off-Broadway production of The Fantasticks, will be temporarily leaving his performing duties to his understudy.
"Aaron is taking a few days off from the show" due to these tragic circumstances, John Capo, the spokesperson for the production, said Wednesday.
"His Fantasticks family loves him and offers him support and prayers during this difficult time," Capo said. "Aaron's understudy and friend, Matt Leisy, will be covering Aaron's role until his return. We thank everyone for the outpouring of concern."
As for Nick Carter?The boy band heart throb has time before he has to resume his professional duties - he isn't scheduled to hit the road with the Backstreet Boys until spring.
When he does, he'll do so with a new, admirable purpose.
"Nick Carter is thankful to the many people and the fans who have shared their wishes and prayers during this tragic time," his publicist, Jack Ketsoyan, told E! News.
"We want to let the fans know the tour will go on as promised."
"Performing is cathartic to me and I am dedicating the rest of my tour to my sister since she loved to watch me perform," Nick Carter said.