Scotty McCreery and Lauren Alaina are using their post 'American Idol' fame to do good things. These country kids took part in the City of Hope Celebrity Softball Challenge as part of the 2011 CMA Music Festival in Nashville last month. They also signed bats used during the game, which are now being auctioned off via eBay for the City of Hope charity along with other worthwhile prizes.

First, a few details about the charity: City of Hope offers compassionate patient care, innovative science and translational research for cancer sufferers, which rapidly turns laboratory breakthroughs into promising new therapies. If you bid on the bats that bear the John Hancocks of McCreery and Alaina, you aid in shortening the time between innovative ideas being translated into actual medical treatments. Donations advance science and the commitment that City of Hope has for the friends and family of cancer patients.

Go here to check out the auction page or here to see the list of items up for grabs.

McCreery's and Alaina's auction packs include signed Rawlings wooden bats which are also adorned with the "City of Hope Celebrity Softball Challenge" logo on the side in black. The winning bidder will receive a Hatch Show Print for the "21st Annual City of Hope Celebrity Softball Challenge," as well as a "Strike Out Cancer" baseball cap and T-shirt. It's a cool set, especially for memorabilia collectors or fans of American's favorite pastime.

There are also McCreery and Alaina signed jerseys and baseballs being auctioned off, so you could potentially start quite the collection.

It's for a terrific cause, so if you are McCreery's or Alaina's number one fan, why not bid on these items and help a charity? Vince Gill, Dierks Bentley, Jake Owen and more country artists also have signed items up for grabs on the auction page.

Watch Scotty McCreery and Lauren Alaina's 'Up on the Roof' Segment from 'Idol'