As two American Idol contestants will face off and present their very best to the viewers who have watched the contest go from hundreds of thousands all hoping for a chance, David Cook will have one special fan in the audience – his brother Adam — who is suffering from brain cancer.

“Extra” has learned that David Cook’s brother, Adam, will be in the American Idol audience to watch the final two shows.

According to their sources, Adam flew to California yesterday morning accompanied by a medic nurse.

As previously reported by AccessHollywood.com, Adam, 36, has been undergoing chemotherapy for his second diagnosis of brain cancer, which had spread to his spine.

It was reported that it was unexpected and unlikely that Adam Cook would be attending the American Idol finale.