Fans are getting up close and personal with their favorite stars in Nashville this week at the CMA Music Festival. This afternoon, Carrie Underwood will trade in her designer duds for a baseball uniform, teaming up with stars like Vince Gill and Craig Morgan in the City of Hope Celebrity softball challenge.

The game kicks off a four-day festival -- country music's biggest event, which includes daily concerts on a riverfront stage followed by nightly concerts at the Tennessee Titans' football stadium. Celebs also set up booths in the city's convention center where they sign autographs and pose for pictures with fans.

Other musicians who will be on site for meet-and-greets are: Martina McBride, Dierks Bentley, Alan Jackson, Reba McEntire, Sara Evans, Little Big Town, Brooks & Dunn, Gretchen Wilson, LeAnn Rimes and Brad Paisley.

More Information on the CMA Music Festival