Question: What singer replaced Diana Ross as the lead singer of The Supremes in January of 1970 and provided the lead vocals on the song "You Gotta Have Love in Your Heart" by the Supremes and the Four Tops?

full_context: Document 1: Up the Ladder to the Roof: "Up the Ladder to the Roof" is a 1970 hit single recorded by The Supremes for the Motown label. It was the first Supremes single to feature new lead singer Jean Terrell in place of Diana Ross, who officially left the group for a solo career two weeks before the recording of this song in January 1970. This song also marks a number of other firsts: it is the first Supremes single since "The Happening" in 1967 to be released under the name "The Supremes" instead of "Diana Ross & the Supremes", the first Supremes single solely produced by Norman Whitfield associate Frank Wilson, and the first Supremes single to make the United Kingdom Top 10 since "Reflections" in 1967.
Document 2: The Return of the Magnificent Seven: The Return of the Magnificent Seven is the second collaborative album between Motown label-mates The Supremes and Four Tops, released in 1971. The production only featured two covers compared to their first album together, "The Magnificent 7", that included more than eight. Although the three albums the Supremes recorded with the Four Tops did not match the commercial success of the Supremes/Temptations duet albums (ironically loaded with covers), what they did have instead were original tunes, soulful lead vocals by Jean Terrell and Levi Stubbs and high production values in terms of arrangements and orchestration.
Document 3: Greatest Hits (The Supremes album): Diana Ross & the Supremes: Greatest Hits (also released as The Supremes: Greatest Hits) is a two-LP collection of singles and b-sides recorded by The Supremes, released by Motown in August 1967 (see 1967 in music). The collection was the first LP to credit the group under the new billing "Diana Ross & the Supremes". Although founding member Florence Ballard is pictured on all album artwork and sings on all the tracks, by the time the set was released, she had been fired from the group and replaced by Cindy Birdsong.
Document 4: Please Return Your Love to Me: "Please Return Your Love to Me" is a 1968 hit single by The Temptations for the Gordy (Motown) label. Produced by Norman Whitfield, who co-wrote the song with Barrett Strong and Barbara Neely, it is the last single to feature David Ruffin in the lineup (he was singing in the background). With Eddie Kendricks singing lead, it peaked on the "Billboard" Hot 100 Pop charts in the Top 30 at number 26, and number 4 on the Billboard R&B Singles charts.
Document 5: Stoned Love: "Stoned Love" is a 1970 hit single recorded by The Supremes for the Motown label. It was the last "Billboard" Pop Top Ten hit for the group, peaking at number seven, and their last "Billboard" number-one R&B hit as well, although the trio continued to score top ten hits in the UK into 1972. This single and "Up the Ladder to the Roof" are the only top-ten Supremes singles to feature Jean Terrell on lead vocals instead of Diana Ross, who left the group in January 1970 to pursue a solo career. In the UK, it was the post-Ross Supremes' biggest hit, reaching number 3 in the singles chart. The single spent six weeks in the UK top ten and five weeks in the US top ten.
Document 6: Live at London's Talk of the Town: Live at London's Talk of the Town is a 1968 live album released by Diana Ross & the Supremes on the Motown label, recorded at the "Talk of the Town" nightclub. This performance marked the first time that new member Cindy Birdsong had performed overseas with original Supremes Diana Ross and Mary Wilson, a year after original founding member Florence Ballard was ousted. The group performed a variation of standards, show tunes, and their own classics with British rock stars Mick Jagger and Paul McCartney reportedly in attendance. The songs recorded are from the group's 1968 European tour. That European tour also garnered a famous Swedish television special that was used as a catalyst to promote this album.
Document 7: You Gotta Have Love in Your Heart: "You Gotta Have Love in Your Heart" is a duet single between Motown singing groups The Supremes and the Four Tops, released as a single from their "The Return of the Magnificent 7" album in 1971. The single became a modest charter peaking at #55 on the U.S. "Billboard" Hot 100 chart and #41 on the U.S. "Billboard" R&B Singles Chart. The single fared better in the UK, where it reached #25 in the official top 50 single chart. Lead vocals were by the groups' respective lead singers Jean Terrell and Levi Stubbs.
Document 8: Diana Ross: Diana Ernestine Earle Ross (born March 26, 1944) is an American singer, songwriter, actress, and record producer. Born and raised in Detroit, Michigan, Ross rose to fame as the lead singer of the vocal group The Supremes, which, during the 1960s, became Motown's most successful act, and is to this day the United States' most successful vocal group, as well as one of the world's best-selling girl groups of all time. Ross' success as lead singer of The Supremes made it possible for future African-American R&B and soul acts to find mainstream success. The group released a record-setting twelve number-one hit singles on the US "Billboard" Hot 100, including "Where Did Our Love Go", "Baby Love", "Come See About Me", "Stop! In the Name of Love", "You Can't Hurry Love", "You Keep Me Hangin' On", "Love Child", and "Someday We'll Be Together".
Document 9: Standing in the Shadows of Love: "Standing in the Shadows of Love" is a 1966 hit single recorded by the Four Tops for the Motown label. Written and produced by Motown's main production team Holland–Dozier–Holland, the song is one of the most well-known Motown tunes of the 1960s. A direct follow-up to the #1 hit "Reach Out I'll Be There" (even featuring a similar musical arrangement), "Standing in the Shadows of Love" reached #2 on the soul chart and #6 on the "Billboard" Hot 100 in 1967. It also reached #6 in the UK. Though the song was well-received, it has received some criticism. Author Martin Charles Strong notes that it rehashed the formula of "Reach Out I'll Be There" and achieved similar success by reaching the Top 10 in both the US and UK. It is ranked #470 on "Rolling Stone" 's list of The 500 Greatest Songs of All Time.
Document 10: The Supremes Sing Country, Western and Pop: The Supremes Sing Country, Western & Pop is the fourth studio album recorded by The Supremes, issued by Motown in February 1965 (see 1965 in music). The album was presented as a covers/tribute album of country songs, as Ray Charles had done with his album " Modern Sounds in Country and Western Music". However, over half of the selections on "The Supremes Sing Country, Western & Pop" were written in-house by Motown staffer Clarence Paul. One of the songs on the album is "My Heart Can't Take It No More", which the Supremes had recorded in 1962 and released in 1963 as a single.
Document 11: Jean Terrell: Jean Terrell (born Velma Jean Terrell, November 26, 1944 in Belzoni, Mississippi) is an American R&B and jazz singer. She replaced Diana Ross as the lead singer of The Supremes in January 1970.
Document 12: Put a Little Love in Your Heart: "Put a Little Love in Your Heart" is a song originally performed in 1969 by Jackie DeShannon, who composed it with her brother, Randy Myers, and Jimmy Holiday. In the US, it was DeShannon's highest-charting hit, reaching number 4 on the Hot 100 in August 1969 and number 2 on the Adult Contemporary charts. In late 1969, the song reached number one on South Africa's hit parade.
Document 13: Farewell (The Supremes album): Farewell is a 1970 live album by Diana Ross & the Supremes. The album was recorded over the course of the group's final engagement together at the New Frontier Hotel and Casino in Las Vegas, Nevada, including the final night on January 14, 1970. The show marked Diana Ross' penultimate performance with fellow Supremes members Mary Wilson and Cindy Birdsong. At the conclusion of the show, new Supremes lead singer Jean Terrell was brought onstage and introduced to the audience.
Document 14: Love Songs (Michael Jackson album): Love Songs is a compilation album by American recording artist Michael Jackson. It was released on January 15, 2002 by Motown Records as a part of "Motown's Love Songs" line. The album contains 14 love songs and ballads Michael Jackson recorded, either by himself or with The Jackson 5, during his time on Motown in the early '70s. In this case there are many hits of Michael (such as "Got to Be There"), or The Jackson 5 hits, such as "Who's Lovin' You,". It also includes an unreleased version of The Jackson 5 hit, "I'll Be There", and the original mix of Michael's "Call on Me".
Document 15: Together (The Supremes and The Temptations album): Together, released by Motown in 1969 (catalog number MS 692), was the second and final duets studio album combining Diana Ross & the Supremes and The Temptations into an eight-person Motown act. Like the first duets LP, "Diana Ross & the Supremes Join The Temptations", it is composed almost entirely of covers, including versions of The Band's "The Weight", Sly & the Family Stone's "Sing a Simple Song", Frankie Valli's "Can't Take My Eyes Off You" (featuring Mary Wilson leading, in preparation for Ross' departure from the Supremes} and Motown songs like "Ain't Nothing Like the Real Thing" and "Uptight (Everything's Alright)". "The Weight" was the only single in the US, and failed to make it into the American Top 40. "Why (Must We Fall in Love)", a UK exclusive single, was a Top 40 hit on the UK singles charts.
ground_truth: Jean Terrell