AceShowbiz -

Kris Allen has announced through his Twitter that he won't be showing his face on "The Tonight Show with Conan O'Brien" this week. He wrote, "I know I was supposed to do conan on wed, but there was a death in my family." No further detail is released regarding the mentioned "death".

The winner of "American Idol" season 8 was supposed to be the musical guest on the talk show this Wednesday, July 15. The stop is slipped in to the running "American Idol" national tour. Allen is scheduled to appear along with 9 other Idol contestants on July 16 at Los Angeles' Staples Center, but no news yet whether or not he will also be absent.

Anticipating the empty slot on "Tonight Show", the Idol who finished fourth, Allison Iraheta, will be "filling in" for Allen. In a later post, he wrote "and by filling in I mean @Allison4Realzzz is gonna rock Conan's face off on Wednesday". Both Allen and Iraheta are signed under the same label, 19Recordings/Jive. They will release their respective albums this Fall after the tour is wrapped up.

The Wednesday night will mark the 28th episode that Conan O'Brien does for the show. Scheduled to be the first guest is celebrity impersonator Dana Carvey who will be there to promote his Orleans Showroom tour which starts July 24. The second guest, however, is not yet announced.

Update: Allen's rep told Access Hollywood that it was the death of his grandmother. Also, the singer will not cancel any of the tour dates.