Changing their name to the Imperials, they signed with End Records in 1958. Their first single was "Tears on My Pillow", which was an instant hit. (While playing this song, D.J. Alan Freed came up with the name "Little Anthony".) The B-side, "Two Kinds of People", was also a hit. The group followed up with "Shimmy, Shimmy, Ko Ko Bop" in 1960. Debuted on the CHUM (Canada) chart in Feb 1960, peaked at #20 & charted for 5 weeks
Debuted on the Billboard pop chart on Dec 7, 1959, peaked at #24 (in 1960) & charted for 16 weeks
Debuted on the Billboard R&B chart on Jan 18, 1960, peaked at #14 & charted for 10 weeks
When their success dwindled in 1961, Little Anthony left to attempt a solo career. Some members left, and the line-up then became Collins, Wright, Sammy Strain, and George Kerr. Kerr was replaced by Kenny Seymour after a short time. This line-up had little success.
Little Anthony returned in 1963, replacing Seymour. The group's classic line-up -- Gourdine, Ernest Wright, Clarence Collins, and Sammy Strain -- was now complete. With the help of record producer/songwriter Teddy Randazzo (a childhood friend of the group), the Imperials found success on the new DCP (Don Costa Productions) label with the dramatic pop-soul records "I'm On The Outside (Looking In)" (1964), "Goin' Out Of My Head" (1964), "Hurt So Bad" (1965), "I Miss You So" (1965), "Take Me Back" (1965), "Hurt" (1966), and "Out of Sight, Out Of Mind" (1969).
Post Script: I couldn't use my mono version as it was too scratchy so I had to use a compilation stereo version instead.