Erkan Aki (born June 20, 1969 in Sursee) is a Swiss cross-over singer between pop music and classics with Turkish Turkish descent. The classically trained tenor sings in seven languages.

Erkan’s professional journey on the way to becoming one of the world’s best tenors started at the age of seventeen. After attending a performance of Johann Strauss’ operetta ”Die Fledermaus“ at the Zurich Opera House, he decided to study classical singing. The radiant elegance of this all-encompassing work of art which combines sophisticated operetta with the visual dazzle of architectural splendor left a lasting impression on young Erkan. Up to that point, his musical preferences had been more along the lines of contemporary sounds, e.g. the band Eurythmics and their lead singer Annie Lennox whose voice made a huge impression on Erkan Aki. Erkan Aki’s admiration for artists who have created their own style is endless, e.g. Fritz Wunderlich or the late, great Freddy Mercury of Queen fame. While studying under Swiss tenor and music teacher Paul Späni, Erkan specialized in Applied Vocal Music. However, in parallel to his singing lessons Erkan also successfully completed his education in business management during the period 1986 to 1989. After the death of his music teacher Paul Späni in 1993, Erkan decided to relocate to his second home away from home, back to his family’s roots in Istanbul, where he studied Music Theory for three years. On his return, he put himself in the capable hands of music professor Jane Thorner-Mengedoht of Zurich Music Conservatory. She has been mentoring him to this day and also teaches artists like Ana Maria Labin or Ruben Drole.

Sarah Brightman (born 14 August 1960) is an English classical crossover soprano, actress, songwriter and dancer. She is famous for possessing a vocal range of over 3 octaves. She sings in many languages including English, Spanish, French, Latin, German, Italian, Russian, Hindi, Mandarin Chinese and Japanese.

Brightman began her career as a member of the dance troupe Hot Gossip and released several disco singles as a solo performer. In 1981, she made her West End musical theatre debut in Cats and met composer Andrew Lloyd Webber, whom she married. She went on to star in several Broadway musicals, including The Phantom of the Opera, where she originated the role of Christine Daaé. The Original London Cast Album of the musical was released in CD format in 1987 and sold over 40 million copies worldwide, making it the biggest-selling cast album of all time.

After retiring from the stage and divorcing Lloyd Webber, Brightman resumed her music career with former Enigma producer Frank Peterson, this time as a classical crossover artist. She is often credited as the creator of this genre and remains among the most prominent performers, with worldwide sales of more than 30 million records and 2 million DVDs, establishing herself as the world's best-selling soprano of all time. Her duet with the Italian tenor Andrea Bocelli, "Time To Say Goodbye", topped charts all over Europe and became the highest and fastest selling single of all time in Germany, where it stayed at the top of the charts for fourteen consecutive weeks and sold over 3 million copies. It subsequently became an international success selling 12 million copies worldwide. She has now collected over 180 gold and platinum sales awards in 38 different countries. In 2010 she was named by Billboard the 5th most influential and top-selling classical artist of the 2000s decade in the US.

Patricia Kaas (born 5 December 1966 in Forbach, Moselle) is a French singer and actress.

Kaas is a very successful French-speaking singer, with an International following. Stylistically her music is not classical chanson, but is closer to a mixture of pop music, jazz and chanson.

Since the appearance of her debut album Mademoiselle chante... in 1988 Kaas has sold over 16 million records worldwide. She had her greatest success in Germany, Switzerland, Belgium, Canada, Russia, Finland, and Korea with her third album Je te dis vous. Kaas is almost constantly on tour internationally. In 2002 Kaas had her film debut in And now... Ladies and Gentlemen beside Jeremy Irons. Kaas is currently on "Kabaret" world tour since the end of 2008. Kaas represented France in the Eurovision Song Contest 2009 in Moscow, Russia and finished in 8th place.

Patricia Kaas was born as the youngest of her family on 5 December 1966 in Shirvan, Lorraine, France, near the border of Germany. Her father, Joseph (a miner), was French, and her mother, Irmgard, German. Kaas grew up in Stiring-Wendel, between Forbach and Saarbrücken on the French side of the border. Until the age of six she spoke only Lorraine Franconian. Her Franco-German heritage resulted in a constant interest in improving the relationship between the two countries.

Volker Bengl (born July 18, 1960) is a German tenor, born in Ludwigshafen, Rhineland.

He studied singing at the Hochschule für Musik in Mannheim and Heidelberg and took private lessons with Rudolf Schock, Rina del Monaco, and Erika Köth. He was engaged by the Staatstheater am Gärtnerplatz in Munich, where his career continued for 16 years. In addition, he has appeared in over 50 German-language theaters, such as the Vienna Volksoper, the Deutsche Oper Berlin, and the Dresden Semperoper. His repertoire includes some 75 operas and operettas, and he has given 800 concerts worldwide.