Question: What characteristic does Bobby Kimball and Philip Bailey share? 
Sentence (from "Philip Bailey"): Philip Irvin Bailey (born May 8, 1951) is an American R&B, soul, gospel and funk singer, songwriter, percussionist and actor, best known as an original member, and one of the two lead singers (along with group founder Maurice White) of the band Earth, Wind & Fire.
Relevant evidence: Yes