1977 to 1978, Fleetwood Mac began recording their third album with Nicks and Buckingham, Tusk, in the spring of 1978. By this time, Nicks had amassed a large backlog of songs that she had been unable to record with Fleetwood Mac because of the constraint of having to accommodate three songwriters on each album. Tusk was released on October 19, 1979. Mirage was recorded in late 1981 and early 1982. Backup vocals and duets While working on Tusk, Nicks sang back-up on virtually every track of Not Shy, recorded by musician Walter Egan, a friend of both Nicks and Buckingham. "Magnet and Steel", inspired by Nicks, prominently featured her back-up vocals and became a hit single on the Billboard Hot 100 chart during the summer of 1978. Lindsey Buckingham also produced the album, playing guitar and providing backing vocals on some of the tracks. Nicks recorded the hit duets "Whenever I Call You Friend" with Kenny Loggins in 1978, and "Gold" with John Stewart in 1979. During 1981, Nicks made occasional guest appearances with Tom Petty and the Heartbreakers on their Hard Promises tour. Solo career Nicks wrote and recorded demos for a solo project during Tusk sessions in 1979 and the Tusk world tour of 1979–80. Nicks, Danny Goldberg, and Paul Fishkin founded Modern Records to record and release Nicks's material. Nicks's first solo album, Bella Donna, was released on July 27, 1981, to critical and commercial acclaim, reaching number one on the Billboard 200 chart, with four singles making the Billboard Hot 100, and Rolling Stone deeming her "the Reigning Queen of Rock and Roll". The day that Bella Donna reached number one on the Billboard 200, Nicks was told that her friend Robin Anderson had leukemia. Anderson was pregnant at the time and given only three months to live. She gave birth to a son, appointing Nicks as the child's godmother. "I never got to enjoy Bella Donna at all because my friend was dying. Something went out that day; something left." Following Robin's death in 1982, Nicks married Robin's widower, Kim Anderson, believing that Robin would want her to care for the baby. "We were all in such insane grief, just completely deranged," she told the Telegraph in 2007. They divorced three months later. Bella Donna introduced Nicks's permanent back-up singers, Sharon Celani and Lori Perry (now Nicks after marrying Stevie's brother Christopher), who have contributed