Question: What American musician recorded both "Lonely" by Sharon Sheeley and "Summertime Blues"?

Context paragraphs:
Lonely (Sharon Sheeley song): "Lonely" is a song written by Sharon Sheeley and recorded by Eddie Cochran.  It was recorded in May 1958 and released posthumously as a single on Liberty F-55278 in August 1960.  In the UK the single rose to number 41 on the charts.  The U.S. release did not chart.  The flip side, "Sweetie Pie", reached number 38 on the UK Singles chart.

Blue Cheer: Blue Cheer was an American rock band that initially performed and recorded in the late 1960s and early 1970s and was sporadically active until 2009.  Based in San Francisco, Blue Cheer played in a psychedelic blues rock style, and are also credited as being some of the earliest pioneers of heavy metal, with their cover of "Summertime Blues" sometimes cited as the first in the genre.  They have also been noted as influential in the development of genres as disparate as punk rock, stoner rock, doom metal, experimental rock, and grunge.

Breakaway (Irma Thomas song): "Breakaway" (spelled "Break-a-Way" on the original 45 RPM label, but usually spelled "Breakaway" on most subsequent releases and compilations) is a song written by Jackie DeShannon and Sharon Sheeley.  It was originally recorded by Irma Thomas in 1964 and released as the B-Side of her biggest hit, the US No. 17 single "Wish Someone Would Care".  A demo version performed by DeShannon was also recorded but remained unreleased until a 1994 compilation.

Shindig!: Shindig!  was an American musical variety series which aired on ABC from September 16, 1964 to January 8, 1966.  The show was hosted by Jimmy O'Neill, a disc jockey in Los Angeles at the time who also created the show along with his wife Sharon Sheeley and production executive Art Stolnitz.  The original pilot was rejected by ABC and David Sontag, then Executive Producer of ABC, redeveloped and completely redesigned the show.  A new pilot with a new cast of artists was shot starring Sam Cooke.  That pilot aired as the premiere episode.

P. J. Proby: P.J. Proby (born James Marcus Smith, November 6, 1938) is an American singer, songwriter, and actor.  He has also portrayed Elvis Presley and Roy Orbison in musical theater productions.  The stage name P.J. Proby was suggested by a friend, Sharon Sheeley, who had a boyfriend of that name at high school.

Poor Little Fool: "Poor Little Fool" is a rock and roll song written by Sharon Sheeley and first recorded by Ricky Nelson in 1958.

Eddie Cochran: Edward Raymond Cochran (October 3, 1938 – April 17, 1960) was an American musician.  Cochran's rockabilly songs, such as "Twenty Flight Rock", "Summertime Blues", "C'mon Everybody", and "Somethin' Else", captured teenage frustration and desire in the mid-1950s and early 1960s.  He experimented with multitrack recording, distortion techniques, and overdubbing even on his earliest singles.  He played the guitar, piano, bass, and drums.  His image as a sharply dressed and good-looking young man with a rebellious attitude epitomized the stance of the 1950s rocker, and in death he achieved an iconic status.

Somethin' Else (song): "Somethin' Else" is a song by the rockabilly musician Eddie Cochran, co-written by his girlfriend Sharon Sheeley and his elder brother Bob Cochran, and released in 1959.  It has been covered by a wide range of artists, perhaps most notably by the Sex Pistols who scored a number 3 hit with it in the UK Singles Chart in 1979.

Vincebus Eruptum: Vincebus Eruptum ( ; pseudo-Latin) is the debut studio album by American rock band Blue Cheer.  Released on January 16, 1968, the album features a heavy-thunderous blues sound, which would later be known as heavy metal.  It also contains elements of acid rock, grunge, experimental rock, blues rock, stoner rock, and garage rock.  A commercial and critical success, "Vincebus Eruptum" peaked at number 11 on the "Billboard" 200 albums chart and spawned the top-20 hit cover of Eddie Cochran's "Summertime Blues".  Being an example of hard rock, it is also lauded as one of the first heavy metal albums.

Summertime Blues: "Summertime Blues" is a song co-written and recorded by American rockabilly artist Eddie Cochran.  It was written by Cochran and his manager Jerry Capehart.  Originally a single B-side, it was released in August 1958 and peaked at number 8 on the "Billboard" Hot 100 on September 29, 1958 and number 18 on the UK Singles Chart.  It has been covered by many artists, including being a number-one hit for country music artist Alan Jackson, and scoring notable hits in versions by The Who and Blue Cheer.  Jimi Hendrix performed it in concert.

Supporting paragraphs: Lonely (Sharon Sheeley song) Eddie Cochran
Answer: Eddie Cochran