International stars who took part in the Eurovision Song Contest
1st place in the Eurovision Song Contest 1988 for Switzerland
Biggest international hits: Because You Loved Me, The Power of Love, My Heart Will Go On
2nd place in the Eurovision Song Contest 1968 for the United Kingdom
Cliff Richard returned in 2973 and finished third with "Power to All Our Friends"
Biggest international hits: We Don't Talk Anymore, Lucky Lips, The Minute You're Gone, (Congratulations, Power to All Our Friends)
1st place in the Eurovision Song Contest 1974 for Sweden
Biggest international hits: Fernando, Dancing Queen, Take a Chance on Me, (Waterloo)
3rd place in the Eurovision Song Contest 2003 for Russia
Biggest international hits: All the Things She Said, All About Us, Not Gonna Get Us
5th place in the Eurovision Song Contest 1982 for Cyprus
Anna Vissi had already represented Greece in 1980 with "Autostop" (13th place) and would do so again in 2006 with "Everything" (9th place)
Biggest international hits: Call Me, Still in Love with You, (Everything)
2nd place in the Eurovision Song Contest 1975 for the United Kingdom
Biggest international hits: Apache, Wonderful Land, Dance On
19th place in the Eurovision Song Contest 2013 for the United Kingdom
Biggest International hits: It's a Heartache, Total Eclipse of the Heart, Holding Out for a Hero
8th place in the Eurovision Song Contest 2009 for France
International hit albums: Dans ma chair, Sexe fort, Kaas chante Piaf
performed by Umberto Tozzi & Raf
3rd place in the Eurovision Song Contest 1987 for Italy
Biggest international hits by Umberto Tozzi: Gloria, Ti amo, Tu
Biggest international hit by Raf: Self Control
1st place in the Eurovision Song Contest 1966 for Austria
Udo Jürgens had already repesented Austria in 1964 and 1965 with "Warum nur, warum" (6th place) and "Sag ihr, ich laß sie grüßen" (4th place) respectively.
Biggest international hit: Griechischer Wein
25th place in the Eurovision Song Contest 2012 for the United Kingdom
Biggest international hits: Release Me (and Let Me Love Again), A Man Without Love, Winter World of Love,
8th place in the Eurovision Song Contest 1963 for Luxembourg
Nana Mouskouri albums charted in at least seven different countries (France, Germany, Austria, Siwtzerland, UK, Canada, US). However, since she recorded different albums for different music markets, she did not have a standout album that was a worldwide success.
9th place in the Eurovision Song Contest 2017 for Australia
Biggest international hit: It's Gotta Be You
12th place in the Eurovision Song Contest 1978 for Italy
Biggest international hits: Sarà perché ti amo, M'innamoro di te, Mamma Maria
5th place in the Eurovision Song Contest 1963 for Monaco.
International hit albums: Tant de belles choses, La pluie sans parapluie, L'amour fou
2nd place in the Eurovision Song Contest 2014 for the Netherlands.
Biggest international hits: (Calm After the Storm), Jolene
International hit albums: II, (The Common Linnets)
5th place in the Eurovision Song Contest 2015 for Australia.
Biggest international hits: Battle Scars, Like a Drum, (Tonight Again)
1st place in the Eurovision Song Contest 1965 for Luxembourg.
Biggest international hits: Ella elle l'a, Babacar, (Poupée de cire, poupée de son)
9th place in the Eurovision Song Contest 2013 for the Netherlands.
Biggest international hits: Nobody's Wife, Lost, (Birds)
1st place in the Eurovision Song Contest 1990 for Italy.
Biggest international hits: L'italiano, Solo noi, (Insieme: 1992)
1st place in the Eurovision Song Contest 1972 for Luxembourg.
Biggest international hits: Ich hab' die Liebe geseh'n, Theo, wir fahr'n nach Lodz, (Après toi/Dann kamst du/Come What May)
3rd place in the Eurovision Song Contest 2015 for Italy.
International hit albums: Il Volo, Notte magica - A Tribute to the Three Tenors, (Grande amore)
21st place in the Eurovision Song Contest 2013 for Germany.
Biggest international hits: Everytime We Touch, Evacuate the Dancefloor, Truly Madly Deeply
1st place in the Eurovision Song Contest 1981 for the United Kingdom.
Biggest international hits: The Land of Make Believe, Piece of the Action, (Making Your Mind Up)
4th place in the Eurovision Song Contest 1988 for Luxembourg.
Biggest international hit: I Will Love Again
International hit albums: Lara Fabian, A Wonderful Life, Toutes les femmes en moi
8th place in the Eurovision Song Contest 1988 for the United Kingdom.
Biggest international hits: I Belong to You, (Ooh Aah .... Just a Little Bit)
15th place in the Eurovision Song Contest 1976 for Germany.
Biggest international hits: Mexico, Mama Loo, Kansas City
1st place in the Eurovision Song Contest 1980 for Ireland.
Johnny Logan returned to the contest as a performer in 1987, winning one more time with "Hold Me Now".
International hit albums: The Irish Connection, Irishman In America, (Hold Me Now)
member of Westlife from 1998 to 2012
15th place in the second semi final of the Eurovision Song Contest 2016 for Ireland.
Biggest international hits with Westlife: Flying Without Wings, Uptown Girl, You Raise Me Up
19th place in the Eurovision Song Contest 2008 for France.
There is no standout hit song by Sébastien Tellier, but his songs and albums charted in at lest six different markets. Furthermore, the song "Fantino" was used in the film "Lost in Translation" and the soundtrack album charted in many countries.
member of O-Zone from 1998 to 2005
20th place in the Eurovision Song Contest 2006 for Moldova.
Biggest international hits with O-Zone: Dragostea din tei, Despre tine
4th place in the Eurovision Song Contest 1979 for Germany.
Biggest international hits: Moskau, Loreley, (Dschinghis Khan/Genghis Khan)
20th place in the semi final of the Eurovision Song Contest 2007 for Switzerland.
Biggest international hits: Somebody Dance with Me, Everybody, Love Is All Around
member of Bus Stop from 1998 to 2002
member of Uniting Nations from 2004 to 2008
9th place in the final of the Eurovision Song Contest 2006 for the United Kingdom.
Biggest international hits with Bus Stop: Kung Fu Fighting (feat. Carl Douglas), Jump
Biggest international hits with Uniting Nations: Out of Touch, You and Me, Ai no corrida
7th place in the final of the Eurovision Song Contest 1979 for the United Kingdom.
Biggest (and I guess only) international hit: Agadoo
Why don't you make a collection, like one song in multiple languages?
Nicole - ein bisschen frieden (German)
Danish: En smule fred
English: A Little Peace
French: La paix sur terre
Italien: Un po’ di pace
Dutch: Een beetje vrede
Russian: Немного мира
Spanish: Un poco de paz
Many spanish artists who had great success in Latin America: Raphael, Julio Iglesias, Mocedades, Paloma San Basilio, Massiel, Peret, Jose Velez, Braulio, Betty Missiego (she's Peruvian but so what), Trigo Limpio, Azúcar Moreno and Sergio Dalma.
Others more:
Representing Italy: Domenico Modugno, Gigliola Cinquetti, Iva Zanicchi, Nicola di Bari, Matia Bazar, Ricchi e Poveri, Toto Cutugno, Il Volo
Representing Luxembourg: Vicky Leandros, Baccara
Representing UK: Matt Monro, Lulu, Olivia Newton-John, Katrina and the Waves
Sakis Rouvas?
He had various singles that charted in Greece and Cyprus (obviously).
Two of his songs and one of his albums charted in France.
His two Eurovision entries charted in Sweden.
So I can't find any non-Eurovision song/album that charted in at least five different countries, sorry. :)
How Anna Vissi is international singer?
Well, it's a collection by my very own rules which state it's for "... musicians who charted in at least five different countries with any single or album that did not include their Eurovision entry." She had songs that charted Greece (obviously), in Cyprus, Russia ("Still in Love with You"), US Dance ("Call Me") and her album "Kravgi" charted in Australia and Turkey. So she was a borderline qualifier for this list, but she in fact met the criteria. :)
There are many more to be added... :)