1982 marked the beginning of Toto's most successful era. After the poor sales of Turn Back, the band was under a great deal of pressure from the record company to produce a new hit record, akin to their first. With the Triple Platinum-certified Toto IV, the band delivered one of the most commercially successful records of the year. The album featured three singles that reached the Top 10 on the Billboard Hot 100 chart: "Rosanna", "Africa" and "I Won't Hold You Back". The album also appeared on several worldwide charts, introducing the band to new audiences around the globe. "Africa" topped the charts in February 1983 and was a constant presence on radios around the world, but it was "Rosanna" that earned the band multiple Grammy nominations. Toto IV earned six Grammy Awards, including "Record of the Year" for "Rosanna", "Album of the Year" for Toto IV and "Producer of the Year". At the time Steve Porcaro was dating actress Rosanna Arquette, but the song is not about her, according to writer David Paich. In the music video for the song, Cynthia Rhodes plays the title character. In addition to "Africa" and "Rosanna", Toto IV continued its successful run with the release of another single, "Make Believe". Toto toured throughout 1982 in support of Toto IV. Also, during this time, Steve Porcaro co-wrote and co-composed "Human Nature", which Michael Jackson recorded for his best-selling album Thriller (1982), turning the song into a smash hit. Jeff Porcaro and Steve Lukather also appeared on Thriller on multiple tracks, most notably the Jackson/Paul McCartney duet "The Girl Is Mine".
