'American Idol' David Cook raises $140K for cancer in honor of brother

david-cook-getty-320.jpgOn Sunday (May 2), "American Idol" Season 7 winner David Cook ran the Washington D.C. Race for Hope and raised $140,000 for the National Brain Tumor Society and Accelerate Brain Cancer Cure in honor of his older brother, Adam Cook.

"I came back because the cause is important to me and my family, as well as countless others. Brain tumors and brain cancer continues to be one of the most under-funded diseases," Cook tells People.

One year ago in May 2009, Cook served as Grand Marshal in the Race For Hope, less than 24 hours after Adam passed away after a decade-long battle with brain cancer. "The last year has been a process," Cook says. "It's all about perspective and remembering what Adam went through so we can work to help avoid anyone else having to do the same."

In addition to running the race, Cook played a charity golf tournament on April 30 and stayed late after the race to take a photo with every cancer survivor who came out. "It's a great way to help continue the fight Adam started almost 12 years ago," Cook said after completing the 3.1 mile run. In total, the event raised $2.3 million for cancer research.

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