Plans have been cancelled for a televised duet between a Whitney Houston hologram and Chrstina Aguilera. The anticipated performance was set to happen during season finale of The Voice, but technical problems have caused the idea to be scrapped. Apparently, after reviewing the performance, the late singer's estate felt that it didn't live up to the quality that, quote, "Whitney's legacy and her devoted fans deserve." So far, NBC has yet to comment on the issue.