Question: What characteristic does Bobby Kimball and Philip Bailey share? 

Context paragraphs:
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.  Noted for his four-octave vocal range and distinctive falsetto register, Bailey has won seven Grammy Awards.  He was inducted into the Rock and Roll Hall of Fame and the Vocal Group Hall of Fame as a member of Earth, Wind & Fire.  Bailey was also inducted into the Songwriters Hall of Fame for his work with the band.

Dave Meros: Dave Meros (born 8 February 1956 in Salinas, California), is an American bass guitar player, best known as the bass player for progressive rock band Spock's Beard.  Meros is also currently the bass player for Iron Butterfly and has also played with such artists as Gary Myrick, Bobby Kimball of Toto, Simon Phillips, Steve Lukather, Michael Landau, Glenn Hughes, Mark Lindsay of Paul Revere and the Raiders and Big Big Train, and played for Eric Burdon and The Animals for nearly 16 years.  He was also tour manager for many of those years and has worked as a tour manager for further artists as well.  As a bassist, Meros' musical influences are varied, including Paul McCartney, John Entwistle, Chris Squire, James Jamerson, Marcus Miller, Francis "Rocco" Prestia of Tower of Power, Chuck Rainey and David Hungate.

Gary Smith (drummer): Gary Smith (born Robert Gary Smith, March 9, 1950) is an American drummer and songwriter.  He was a member of Chase and a founding member of Survivor.  Smith has also performed or recorded with B.B. King, Joe Williams, Vic Damone, Patrick Leonard, Leslie West (Mountain), Steve Forman, Will Lee, Elliott Randall, Bobby Kimball, Tommy Shaw, Darryl Jones, Jim Peterik, John Gary, Bruce Gaitsch, Eric Miyashiro, Clark Terry, Chuck Findley, Larry Carlton, Jaco Pastorius and many others.

Philip Bailey (album): Philip Bailey is the self-titled 1994 album by American R&B and soul singer Philip Bailey.  It is Bailey's seventh solo album and features many other artists.  Production credits go to Chuckii Booker, Brian McKnight and PM Dawn.

Hold the Line: "Hold the Line" is a song by the American rock band Toto.  The song was written by the band's keyboardist David Paich, and the lead vocals were performed by Bobby Kimball.  The song was released as the band's debut single, and was featured on their debut 1978 eponymous album.  The song was a huge success in the U.S.; it reached Number 5 on the Billboard Hot 100 chart during the winter of 1978–79, and Number 14 on the official UK chart.

Bobby Kimball: Robert Troy "Bobby" Kimball (born March 29, 1947) is an American singer, best known as the original and longtime frontman of the rock band Toto.

Sailaway: Sailaway is a song by the American R&B band Earth, Wind & Fire, written by Philip Bailey, Eduardo del Barrio, Maurice White and Roxanne Seeman.  It was recorded during the Faces sessions in 1980 and appears on the album.  In June 1999, Philip Bailey featured a jazz version of “Sailaway” under the title “Sail Away” on his Dreams album.

The Best of Philip Bailey: A Gospel Collection: The Best of Philip Bailey: A Gospel Collection is a 1991 compilation gospel album by Philip Bailey which was released on the Word Records label.

Easy Lover: "Easy Lover" is a song performed by Philip Bailey, of Earth, Wind & Fire, and Phil Collins and jointly written and composed by Bailey, Collins, and Nathan East.  The song appeared on Bailey's solo album "Chinese Wall."  Collins has performed the song in his live concerts and it appears on both his 1990 album "Serious Hits... Live! " and his 1998 compilation album, "...Hits."

Bobby Kimball (American football): Bobby Kimball (born Robert Lund Kimball) is a former wide receiver in the National Football League.  He was a member of the Green Bay Packers for two seasons.

Supporting paragraphs: Bobby Kimball Philip Bailey
Answer: American singer