Background: Carlos Santana  audio  (born July 20, 1947) is a Mexican and American musician who first became famous in the late 1960s and early 1970s with his band, Santana, which pioneered a fusion of rock and Latin American jazz. The band's sound featured his melodic, blues-based guitar lines set against Latin and African rhythms featuring percussion instruments such as timbales and congas not generally heard in rock music. Santana continued to work in these forms over the following decades. He experienced a resurgence of popularity and critical acclaim in the late 1990s.
Context: More radio-friendly singles followed from Santana and the band. "Winning" in 1981 (from Zebop) and "Hold On" (a remake of Canadian artist Ian Thomas' song) in 1982 both reached the top twenty. After his break with Sri Chinmoy, Santana went into the studio to record another solo album with Keith Olson and legendary R&B producer Jerry Wexler. The 1983 album Havana Moon revisited Santana's early musical experiences in Tijuana with Bo Diddley's "Who Do You Love" and the title cut, Chuck Berry's "Havana Moon". The album's guests included Booker T. Jones, the Fabulous Thunderbirds, Willie Nelson and even Santana's father's mariachi orchestra. Santana again paid tribute to his early rock roots by doing the film score to La Bamba, which was based on the life of rock and roll legend Ritchie Valens and starred Lou Diamond Phillips.  The band Santana returned in 1985 with a new album, Beyond Appearances, and two years later with Freedom.  Growing weary of trying to appease record company executives with formulaic hit records, Santana took great pleasure in jamming and making guest appearances with notables such as the jazz fusion group Weather Report, jazz pianist McCoy Tyner, Blues legend John Lee Hooker, Frank Franklin, Living Colour guitarist Vernon Reid, and West African singer Salif Keita. He and Mickey Hart of the Grateful Dead later recorded and performed with Nigerian drummer Babatunde Olatunji, who conceived one of Santana's famous 1960s drum jams, "Jingo". In 1988 Santana organized a reunion with past members from the Santana band for a series of concert dates. CBS records released a 20-year retrospective of the band's accomplishments with Viva Santana! double CD compilation. That same year Santana formed an all-instrumental group featuring jazz legend Wayne Shorter on tenor and soprano saxophone. The group also included Patrice Rushen on keyboards, Alphonso Johnson on bass, Armando Peraza and Chepito Areas on percussion, and Leon "Ndugu" Chancler on drums. They toured briefly and received much acclaim from the music press, who compared the effort with the era of Caravanserai (1972). Santana released another solo record, Blues for Salvador (1987), which won a Grammy Award for Best Rock Instrumental Performance.  In 1990, Santana left Columbia Records after twenty-two years and signed with Polygram. The following year he made a guest appearance on Ottmar Liebert's album, Solo Para Ti (1991), on the songs "Reaching out 2 U" and on a cover of his own song, "Samba Pa Ti". In 1992 Santana hired jam band Phish as his opening act.
Question: who did he make guest appearances for?
Answer: the jazz fusion group Weather Report, jazz pianist McCoy Tyner, Blues legend John Lee Hooker, Frank Franklin, Living Colour guitarist Vernon Reid, and West African singer Salif Keita.

Background: Usher was born in Dallas, Texas, the son of Jonetta Patton (nee O'Neal), from Tennessee, and Usher Raymond III. Usher spent the majority of his young life in Chattanooga: his father left the family when Usher was a year old. Usher grew up with his mother, then-stepfather, and half-brother, James Lackey (born 1984). Directed by his mother, Usher joined the local church youth choir in Chattanooga, when he was nine years old.
Context: Usher developed a friendship with American record producer, Jermaine Dupri, with whom he co-wrote and produced several tracks for his second album, My Way, released on September 16, 1997. The album's lead single, "You Make Me Wanna...", reached number one in the United Kingdom, becoming Usher's first record to be top single; the record led to his popularity reaching in the country. It also became Usher's first gold- and platinum-certified single in the United States. The album's second single, "Nice & Slow", peaked in January 1998 at number one on the Billboard Hot 100, giving Usher his first US number-one single. In February of the same year, the single was certified platinum by the RIAA. My Way has been certified six-time platinum in the United States.  "You Make Me Wanna..." won the Best Male R&B/Soul Single at the 1999 Soul Train Music Awards. In the closing months of 1997, Usher embarked on a series of tour engagements including a spot on Puffy's No Way Out tour, dates with Mary J. Blige, and the opening spot on Janet Jackson's The Velvet Rope Tour. Usher's first concert album, Live, was released in 1999, which featured appearances by Lil' Kim, Jagged Edge, Trey Lorenz, Shanice, Twista and Manuel Seal; the album has been certified gold in the United States.  Usher made his acting debut on the UPN television series Moesha, which resulted in a recurring role on the series and subsequently his first film role in 1998's The Faculty. Usher's extracurricular activities outside of the recording industry gathered momentum over the following year as he was cast in the soap opera, The Bold and the Beautiful. He completed two more films, She's All That, and his first starring role in Light It Up. He also appeared in the Disney TV movie Geppetto.  Usher's third studio album, originally titled All About U, was slated to be released in early 2001. The first single, "Pop Ya Collar", was released in late 2000 and became a number two hit in the UK but underperformed in the United States. The album was subsequently pushed back and retooled after select tracks were later leaked to the radio and Internet. After having revised and renamed to 8701, the album was released August 7, 2001 (8.7.01). The first two singles "U Remind Me" and "U Got It Bad" each topped the Billboard Hot 100 for four and six weeks, respectively. 8701 has been certified four-time platinum in the United States.  Usher appeared in the 2001 film Texas Rangers. In February 2002, Usher won a Grammy for Best Male R&B Vocal Performance for "U Remind Me". The next year, he won the same award for "U Don't Have to Call", making Usher the only artist aside from Luther Vandross and Stevie Wonder to win this award consecutively. In summer 2002, Usher contributed vocals to P. Diddy's "I Need a Girl, Part I". The year closed out with a trio of TV series appearances, all in November, on The Twilight Zone, 7th Heaven, Moesha, and American Dreams, the latter in which Usher portrayed Marvin Gaye.
Question: What is the relation between Usher and My way?
Answer:
Usher developed a friendship with American record producer, Jermaine Dupri, with whom he co-wrote and produced several tracks for his second album,