Question: Who sang the song which was before Loverboy on  the U.S. Billboard Hot 100?

full_context: Document 1: Loverboy (Billy Ocean song): "Loverboy" was Billy Ocean's second single from his 1984 album, "Suddenly". It was produced by Keith Diamond and reached a chart high of number 2 on the U.S. Billboard Hot 100 (behind "Careless Whisper" by Wham! featuring George Michael) as well as hitting number 20 on the soul chart, and number 15 on the UK Singles Chart in February 1985. It also reached the top spot of the Hot Dance Music/Club Play chart in the U.S., in an extended version. The track was released on the Jive label under the catalogue reference, JIVE 80. This song was played in the 1st episode of the BBC One's British medical soap Casualty back on 6th September 1986.
Document 2: Careless Whisper: "Careless Whisper" is a song by English singer-songwriter George Michael (sometimes credited to "Wham! featuring George Michael" in Japan, Canada and the United States). It was released on 24 July 1984, by Epic Records in the United Kingdom, Japan and other countries, and by Columbia Records in North America. The song was George Michael's first solo single, although he was still performing in Wham! at the time (the song is included on Wham!'s album "Make It Big").
Document 3: Year of the Lover: "Year of the Lover" is a song by American R&B recording artist Lloyd, released as the third and final single from his third studio album "Lessons in Love" (2008). The song was produced by Eric Hudson and written by Rico Love. It was sent to U.S. radio stations on July 10, 2009. The single was only released in the United States, where it only reached #101 on "Billboard" Hot R&B/Hip-Hop Songs chart. Although the song was a favorite among many, the single lacked promotion and didn't receive a music video. The single version features rapper Plies. Both Plies and Fabolous was featured on the song in "Lessons in Love 2.0". Other remixes come from Rock City.
Document 4: This Could Be the Night (Loverboy song): "This Could Be the Night" is a song written by Paul Dean, Mike Reno, Bill Wray and John Friga and recorded by the Canadian rock band Loverboy from their hit album, "Lovin' Every Minute of It", released in 1985. The song contained much more of a style that represented 1980s power pop ballads than the rocking style for which the band had been known. Released as a single in 1986, it reached the top ten on the "Billboard" Hot 100 singles chart.
Document 5: Black or White: "Black or White" is a single by American singer and songwriter Michael Jackson. The song was released by Epic Records on November 11, 1991 as the first single from Jackson's eighth studio album, "Dangerous". It was written, composed and produced by Michael Jackson and Bill Bottrell.
Document 6: Vision of Love: "Vision of Love" is a song by American singer and songwriter Mariah Carey. It served as Carey's debut single, the first from her eponymous debut album. Written by Carey and Ben Margulies, "Vision of Love" was released on May 15, 1990, by Columbia Records. After being featured on Carey's demo tape for Columbia, the song was re-sung and produced by Rhett Lawrence and Narada Michael Walden. "Vision of Love" features a slow-dance theme tempo and backing vocals sung by Carey herself, and introduces her usage of the whistle register. Lyrically, the song describes a past and present relationship with a lover. Carey describes the "vision of love" she dreamed of, as well as the present love she feels for him.
Document 7: I'll Make Love to You: "I'll Make Love to You" is a 1994 number-one hit single by R&B group Boyz II Men for the Motown label. The song, which was written by Babyface, was the lead single from their second album "II".
Document 8: When It's Over (Loverboy song): "When It's Over" was a song written by band members Paul Dean and Mike Reno, released by the rock band Loverboy from their album "Get Lucky" in 1981. Relying heavily on synthesizers, the song became a Top 40 hit for the band when released as a single the following year, reaching #26 on the charts.
Document 9: Loverboy: Loverboy is a Canadian rock band formed in 1979 in Calgary, Alberta. Loverboy's hit singles, particularly "Turn Me Loose" and "Working for the Weekend", have become arena rock staples and are still heard on many classic rock and classic hits radio stations across Canada. The band is based in Vancouver.
Document 10: Somebody's Watching Me (album): Somebody's Watching Me is singer/songwriter Rockwell's debut album, released in 1984 on Motown. It featured the song, "Somebody's Watching Me" (with Michael Jackson on vocals in the chorus), as well as the minor hit "Obscene Phone Caller".
Document 11: George Michael: Georgios Kyriacos Panayiotou (25 June 1963 – 25 December 2016), known professionally as George Michael, was an English singer, songwriter, record producer, and philanthropist who rose to fame as a member of the music duo Wham! He was best known for his work in the 1980s and 1990s, including hit singles such as "Wake Me Up Before You Go-Go" and "Last Christmas", and albums such as "Faith" (1987) and "Listen Without Prejudice Vol. 1" (1990).
Document 12: Lover Come Back to Me (Dead or Alive song): "Lover Come Back to Me" is a 1985 single by Dead or Alive, produced by Stock Aitken Waterman. It was released as the second single from the band's second album, "Youthquake", and the single mix features slightly different instrumentation to the album version but is generally the same. The single peaked at #11 in the UK, #3 in South Africa, #21 in Germany, #13 in Australia and #75 on the US "Billboard" Hot 100.
Document 13: Lovin' Every Minute of It (song): "Lovin' Every Minute of It" is a song released in 1985 on the Canadian rock band Loverboy's album of the same title. The song reached #9 on the U.S. Billboard Hot 100 when released as a single later that year. It was written by Robert John "Mutt" Lange. In Canada, the song peaked at #11.
Document 14: The Way You Make Me Feel: "The Way You Make Me Feel" is a song by American recording artist Michael Jackson. It was written and composed by Jackson and produced by Jackson and Quincy Jones. Released by Epic Records in November 1987, it was the third single from Jackson's seventh studio album "Bad".
Document 15: Wake Me Up Before You Go-Go: "Wake Me Up Before You Go-Go" is a song by the British duo Wham!, first released as a single in the UK on 14 May 1984. It became their first UK and US number one hit. It was written and produced by George Michael. The single was certified Platinum in the US, which at the time commemorated sales of over two million copies.
ground_truth: George Michael