Who's your daddy? Tim McGraw? Brad Paisley? With Father's Day less than two weeks away, fans all over the country now have a chance to vote for their favorite celebrity dad, including a few country superstars, and it's all for a good cause.

The first-ever Big Daddy Awards have been announced, but the intent is much bigger than picking the best father. Started by On the Line, a national prostate cancer awareness and education program, the Big Daddy Awards aim to raise both funds and awareness for prostate cancer programs, as well as to help fund research to find a cure.

In addition to Brad and Tim, Trace Adkins, Darius Rucker and Keith Urban are among the nominees. They join an all-star round-up of other celebrity dads, including Brad Pitt, Matt Damon, Chris Rock, Dr. Oz, Lionel Richie and Eminem.

Voting is currently underway and will be open through Father's Day, Sunday, June 17. Click here to vote for your favorite celebrity dad! The winner will be announced on Monday, June 18.

Make a donation to On the Line here.

Watch a Video on Detecting Prostate Cancer

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