Question:
Steven Siro Vai (; born June 6, 1960) is an American guitarist, composer, singer, songwriter, and producer. He was voted the "10th Greatest Guitarist" by Guitar World magazine, and has sold over 15 million records. A three-time Grammy Award winner and fifteen-time nominee, Vai started his music career in 1978 at the age of 18 as a transcriptionist for Frank Zappa, and joined his band from 1980 to 1983. He embarked on a solo career in 1983 and has released eight solo albums to date.
In 1978, Vai sent both a notated transcription of Frank Zappa's "The Black Page", and a recording of his college band, Morning Thunder, to Zappa. Impressed by this, Zappa responded by putting Vai on salary as a transcriptionist to transcribe his work, which included pieces from the Joe's Garage and Shut Up 'n Play Yer Guitar albums. After leaving Berklee College of Music and moving to California, Vai auditioned for and became a full-time member of Zappa's band, going on his first tour with Zappa in the fall of 1980. Zappa often referred to Vai as his "little Italian virtuoso", and Vai is frequently listed in the liner notes of Zappa's albums as having performed "stunt" or "impossible" guitar parts.  Vai was a featured artist on the 1993 release Zappa's Universe, and in 2006, Vai appeared as a special guest on Dweezil Zappa's Zappa Plays Zappa tour; both projects won Vai a Grammy Award.  After moving on from Zappa's employ in 1983, Vai bought a house in Sylmar, Los Angeles, where he built his first professional studio. During this period, Vai formed two bands (The Classified and 777) as well as writing and recording a large amount of music that was not originally intended for release. Out of this material, Vai compiled his first studio album Flex-Able. He created his own record label, Akashic Records (later Light Without Heat Records), which he used to take Flex-Able directly to distribution channels. Flex-Able was released in January 1984.  Vai began his rise to public acclaim in 1983 when, shortly before the release of Flex-Able, his composition "The Attitude Song" was published in Guitar Player magazine. The song centered itself on a main guitar riff in the time signature 7/16, played over a rhythm section centered in 4/4. Each following section of the song showcased a number of specialized techniques (such as two-handed tapping, whammy bar acrobatics, sweep picking, alternate picking, multi-part harmonies, and odd phrasing) used in angular and exaggerated ways that were unique to the song at the time. Interest from the public eye grew more so when Vai's song "Blue Powder" (a demonstration for the Carvin X100b amplifier) was published in Guitar Player as well, which showed the virtuoso side of Vai's compositional process. Also in 1986, Vai was cast in the blockbuster film Crossroads as the Devil's guitar player "Jack Butler". In the famous "duel scene" between Vai and Ralph Macchio's characters, Vai wrote and performed all guitar parts with the exception of the slide guitar, which was performed by Ry Cooder.  In between solo work, Vai replaced Yngwie Malmsteen in June 1984 as the lead guitarist of Alcatrazz, with whom he recorded the album Disturbing the Peace. Vai left shortly after the subsequent tour to join David Lee Roth's band.
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How did Zappa influence his career?

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Rain was born as Jung Ji-hoon on June 25, 1982, in Seosan, South Chungcheong Province in South Korea. His mother died in December 2000 as she struggled with diabetes. In the same year, Rain was recruited as a trainee for JYP Entertainment, led by recording artist and producer Park Jin-young. In a CNN interview and also in a Discovery Channel documentary called Discovering Hip Korea, he recalled being repeatedly rejected because of his looks: "In fact, I was told after one audition that my singing and dancing was great
Rain is considered a 'world star' due to his popularity, not only in South Korea and Japan, but throughout Asia, Europe and North America with fans in countries like China, Singapore, Thailand, Canada and United States. Much of his popularity is attributed to his various acting roles (varying from television like Full House to indie films like I'm a Cyborg, But That's OK to blockbusters like Ninja Assassin). Before landing his role in Speed Racer, he had expressed the desire to expand beyond the Asian market when he stated in an interview, "The reason I am active in Japan, Hong Kong, China and around Asia is that I want to succeed here and then go even more international...I would really like to see, is a top Asian artist emerge strongly from the Asian market, and then go on to succeed in the U.S. market."  Rain's appeal to all demographics has made him one of Korea's highest paid celebrities by endorsers with an asking price of $1 - 1.5 million USD per endorsement. Over the years, he endorsed brands such as Hyundai, Lotte, KB Card, Pizza Hut, Thailand dairy company Dutch Mill, Chinese pastry Fu Mu Cakes, Pantech, LG Electronics, SK Telecom and Pepsi. Rain has even done songs to tie-in with endorsement deals. "Still Believe" was used as both an ad and a music video for BMW Korea's "Meet the Truth" campaign with appearances by Rain as well as JYP. "Memory in My Hand" and "Any Dream" were used in campaigns for Pantech and Samsung, respectively, in China.  With his booming popularity throughout the world, he has been deemed a "cultural ambassador" as he has represented South Korea in inter-Asian musical events and has appeared in a Thai published textbook.

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Rain's appeal to all demographics has made him one of Korea's highest paid celebrities by endorsers with an asking price of $1 - 1.5 million