Question: Friðrik Karlsson is an Icelandic musician and songwriter who contributed to the soundtrack of musical with a book by Nan Knighton and music and lyrics by who?

full_context: Document 1: Johnny Montagnese: Johnny Montagnese, a professional drummer for over thirty five years, has traveled the world extensively with many well known bands which enhanced his ability to play exceptionally well in a wide spectrum of music styles. He is also the owner and manager of Carriage House Studios in Stamford, CT, and a trusted and talented producer of many exceptional artists, from the Stylistics, Meatloaf, Beyoncé to Diana Ross, Pantera, and the Pixies to the Harlem Boys Choir to name just a few. . . Montagnese is also educated as a child psychologist which supports his desire to help young upstarts to get off the streets and into the studio. Carriage House Studios in Stamford, Connecticut has been nominated for two Grammy Awards and Johnny has offered Crescendo Productions Summer Rock Band Program the opportunity to study at the Studios and have at the students’ disposal, both analog and digital equipment.
Document 2: West Side Story: West Side Story is a musical with a book by Arthur Laurents, music by Leonard Bernstein, lyrics by Stephen Sondheim and conception and choreography by Jerome Robbins. It was inspired by William Shakespeare's play "Romeo and Juliet".
Document 3: A Chorus Line: A Chorus Line is a musical with music by Marvin Hamlisch, lyrics by Edward Kleban and a book by James Kirkwood, Jr. and Nicholas Dante. Centred on seventeen Broadway dancers auditioning for spots on a chorus line, the musical is set on the bare stage of a Broadway theatre during an audition for a musical. "A Chorus Line" provides a glimpse into the personalities of the performers and the choreographer as they describe the events that have shaped their lives and their decisions to become dancers.
Document 4: Back to the 80s (musical): Back to the 80's [sic] is a musical written by Neil Gooding with the original musical adaption made by Scott Copeman. It was later re-orchestrated and arranged by Brett Foster in 2003, just prior to the Australian Production. It was originally staged by Neil Gooding Productions Pty Ltd in Sydney, Australia in 2004. It is a popular show for school productions in the English speaking world.
Document 5: Garðar Thór Cortes: Garðar Thór Cortes (pronounced ] , born 2 May 1974), is an Icelandic tenor of Icelandic and English parentage. A former child actor, Garðar subsequently trained as a singer in Vienna, Copenhagen and London. He has performed various leading tenor roles in operas, as well as a leading part in "The Phantom of the Opera" in London's West End. While insisting that he is first and foremost a classical opera singer, it was with his classical crossover album "Cortes", released in Iceland in 2005, that Garðar came to prominence. His debut album in the UK, also titled "Cortes", was released on 16 April 2007 and entered the UK Classical Charts at number 1.
Document 6: Kiri Sings Karl: Kiri Sings Karl is a 2006 classical album by New Zealand opera singer Kiri Te Kanawa, conducted by Karl Jenkins. All but one of the pieces are composed by the acclaimed Argentine classical composer Carlos Guastavino. ("Misa Criolla" is by the Argentine composer Ariel Ramirez).
Document 7: Friðrik Karlsson: Friðrik Karlsson is an Icelandic musician and songwriter. He studied classical and jazz/rock guitar and had success with the group Mezzoforte in 1983 with the U.K. top 20 hit, "Garden Party". He has contributed to the soundtracks of musicals such as Jesus Christ Superstar and Saturday Night Fever and to that of movies such as Evita and Hercules. His TV work includes accompanying singers Madonna, José Carreras and Tom Jones. Karlsson has also appeared on albums and singles from Boyzone and Cliff Richard, among others. Karlsson has moved back home to his native Iceland,after living in London,where he among other jobs worked as a session musician playing guitar in the musical Jesus Christ Superstar. He has released numerous new-age and relaxation music albums known as "The Feel Good Collection". In 2014, Karlsson also played as session musician for Kate Bush's first live performances in 35 years, playing guitar for 22 dates.
Document 8: Chris Laurence: Chris Laurence was born in London and studied at the Guildhall School of Music. He has maintained a dual career in both jazz and classical music. In the classical world he was principal double bass with the Academy of St. Martin in the Fields Orchestra until 1995, playing on many of their famous recordings ranging from the film “Amadeus” to Benjamin Britten’s “Curlew River”. Jazz artists he has recorded with include trombonist J.J.Johnson, Tony Coe, Joe Williams, Sarah Vaughan, Clark Terry, Johnny Mathis and Lena Horne. His current recordings are John Surman’s “The Spaces in Between”, Kenny Wheelers “The Long Waiting” and “Songs For Quintet” on the ECM Label and Norma Winstone’s “Manhattan in the Rain”. He also spends a lot of time recording music for TV, Film and Albums, most notably “Leaving Las Vegas”, Ken Loach’s “Looking For Eric”, “The Constant Gardener”, Howard Shores’ score for “Hugo” and most recently was featured on the sound track of Mike Leigh’s “Mr Turner”. In 2007 he recorded a CD with his own jazz quartet titled “New View”, released on the “Basho” label along with Frank Ricotti (vibes), John Parricelli (Guitar), Martin France (Drums) and featuring Norma Winstone (Vocals). As well as jazz and classical music, Chris has also featured on albums with many stars including Elton John, Sting, Peter Gabriel, Mary Chapin Carpenter, Joni Mitchell, David Gilmour, Michel Legrand and guitarist John Williams.
Document 9: High School Musical on Stage!: High School Musical on Stage! is a musical based on the Disney Channel Original Movie "High School Musical", with music and lyrics by Matthew Gerrard, Robbie Nevil, Ray and Greg Cham, Drew Seeley, Randy Petersen, Kevin Quinn, Andy Dodd, Adam Watts, Bryan Louiselle, David N. Lawrence, Faye Greenberg and Jamie Houston, and a book by David Simpatico. It has quickly become a very popular choice for high school musical theatre productions.
Document 10: Sweet Charity: Sweet Charity is a musical with music by Cy Coleman, lyrics by Dorothy Fields and book by Neil Simon. It was directed and choreographed for Broadway by Bob Fosse starring his wife and muse Gwen Verdon alongside John McMartin. It is based on Federico Fellini's screenplay for "Nights of Cabiria". However, where Fellini's black-and-white Italian film concerns the romantic ups-and-downs of an ever-hopeful dance hall hostess, in the musical the central character is a dancer-for-hire at a Times Square dance hall. The musical premiered on Broadway in 1966, where it was nominated for 9 Tony Awards, and also ran in the West End as well as having revivals and international productions.
Document 11: Saturday Night Fever: Saturday Night Fever is a 1977 American musical drama film directed by John Badham. It stars John Travolta as Tony Manero, a working-class young man who spends his weekends dancing and drinking at a local Brooklyn discothèque; Karen Gorney as Stephanie Mangano, his dance partner and eventual confidante; and Donna Pescow as Annette, Tony's former dance partner and would-be girlfriend. While in the disco, Tony is the champion dancer. His circle of friends and weekend dancing help him to cope with the harsh realities of his life: a dead-end job, clashes with his unsupportive and squabbling parents, racial tensions in the local community, and his general restlessness.
Document 12: Neil Carter (musician): Neil Andrew Carter (born 11 May 1958) is a musician who has worked in diverse genres throughout his 35-year career. Classically trained, he became a professional rock musician at the age of 17 and initially had his first "mainstream" experience with singer-songwriter Gilbert O'Sullivan. He subsequently played guitar and keyboard for the hard rock band UFO, blues rock guitarist Gary Moore, and Wild Horses. He is credited for co-writing a number of Gary Moore's songs including the worldwide hit "Empty Rooms". At 30 he left the rock world and has in recent years developed a different career as both teacher of woodwind (saxophone and clarinet) and as an ABRSM examiner. 2010 saw a return to rock with Gary Moore, playing festivals across Europe and a tour of Ukraine and Russia. Future tours and a Celtic rock album were to follow but this was curtailed by the death of Gary Moore in February 2011. He also plays other instruments including the flute and bassoon.
Document 13: Saturday Night Fever (musical): Saturday Night Fever is a musical with a book by Nan Knighton (in collaboration with Arlene Phillips, Paul Nicholas, and Robert Stigwood) and music and lyrics by the Bee Gees.
Document 14: Kevin R. Gallagher: Kevin R. Gallagher is a guitarist who plays both the electric guitar and the classical guitar. As a classical guitarist, he has received top honors at some of the most prestigious guitar competitions in the world, including the 1993 Guitar Foundation of America, the 1994 American String Teachers Association, the 1993 Artists International Competition, and 1997 Francisco Tárrega Guitar Competition in Spain. As an electric guitarist, he is known for transcribing violin music for electric guitar and for founding the avant-rock ensemble Electric Kompany. He has also produced, in cooperation with John Zorn, a music festival titled "Full Force: The New Rock Complexity" that showcases bands that have combined styles such as classical, rock, jazz, and metal. He has produced a CD for Naxos Records titled "Guitar Recital - Music from the Renaissance and Baroque," a duo CD with Antigoni Goni titled "Evocacion," and an EP featuring his work on solo electric guitar and with Electric Kompany.
Document 15: Ric Fierabracci: Ric Fierabracci is an American bassist who has toured and/or recorded with such artists as Frank Gambale, Chick Corea, Sir Tom Jones, Dave Weckl, Bradley Joseph, Shakira, Nancy Sinatra, Planet X, The 5th Dimension, The Beach Boys, and Yanni. He is featured on Yanni's live concert videos and albums "Yanni Live at the Acropolis", "Yanni Live at Royal Albert Hall", and "Tribute", most recently touring during the 2003 "Ethnicity" world tour. He also appears in Shakira's music video "Inevitable". Fierabracci had performed as the house bassist at the L.A. jazz club "The Baked Potato" until he relocated to New York City, and has also contributed to numerous TV and film jingles.
ground_truth: the Bee Gees