United States in the 1950s Ernie Ford, Loretta Lynn, Chet Atkins, Guy Mitchell, Nat King Cole, and vocal groups like The Mills Brothers, The Ink Spots, The Four Lads, The Four Aces, The Chordettes, The Jordanaires, and The Ames Brothers. Jazz stars in the 1950s who came into prominence in their genres called Bebop, Hard bop, Cool jazz and the Blues, at this time included Lester Young, Ben Webster, Charlie Parker, Dizzy Gillespie, Miles Davis, John Coltrane, Thelonious Monk, Charles Mingus, Art Tatum, Bill Evans, Ahmad Jamal, Oscar Peterson, Gil Evans, Gerry Mulligan, Cannonball Adderley, Stan Getz, Chet Baker, Dave Brubeck, Art Blakey, Max Roach,
John Coltrane played together occasionally in the late 1940s. He was a member of groups led by Dizzy Gillespie, Earl Bostic, and Johnny Hodges in the early to mid-1950s. In the summer of 1955, Coltrane was freelancing in Philadelphia while studying with guitarist Dennis Sandole when he received a call from Davis. The trumpeter, whose success during the late forties had been followed by several years of decline in activity and reputation, due in part to his struggles with heroin, was again active and about to form a quintet. Coltrane was with this edition of the Davis band (known as the "First