by Rob TheakstonBefore he embarked on a solo career, David Pack was firmly entrenched in the core of the soft rock movement of the mid-'70s into the early '80s as the lead singer for Ambrosia. His first solo endeavor in 1985 failed to live up to the quality and caliber of Ambrosia's releases, but did spawn the hit "I Just Can't Let Go," which featured guest vocalists James Ingram and Michael McDonald. After close to two decades behind the scenes producing and writing songs for other artists, he returned to performing with 2004's Unborn. His 2005 effort, The Secret of Movin' On, was a tour de force of guest appearances and placed him well on his way down the long and winding road that is the musical comeback trail.\r