Dierks Bentley's Miles & Music for Kids celebrity motorcycle ride and concert has expanded its list of performers with the addition of Michelle Branch, Heidi Newfield and Wynonna. The all-day event will take place on Oct. 11 in Nashville. As previously announced, Bentley will also be joined by Eric Church and Darius Rucker. Tickets start at $20. The Nashville event will benefit the Monroe Carell Jr. Children's Hospital at Vanderbilt. Bentley has planned six similar events across the U.S. in 2009 and 2010.