Ken A Go Go #1423 was available 1966-1967.   "Beatlemania" inspired Ken to try out his first "solo in the spotlight".  The outfit featured gold zippered slacks and a retro style multi-color red/blue/yellow stripe shirt with red collar, sleeves and backing.   Red socks and white tennis shoes completed the clothing.  Accessories included the orange ukulele (now deemed a guitar with the added black strap) from Ken in Hawaii #1404, an adjustable gray plastic microphone like the one found in Barbie's Solo in the Spotlight #982 and a fun fur black wig to cover the prep school crew cut.