The Eurovision Song Contest in 2011 was won by Ell/Nikki. The song performed was "Running Scared" and was performed for Azerbaijan. The contest took place in Dusseldorf, Germany, as Germany won it the previous year.
Azerbaijan won the Eurovision Song Contest 2011, with the song "Running Scared" by Eldar and Nigar.
Abba won the Eurovision Song Contest of 1974, which was hosted by Great Britain.
Abba won one Eurovision Song Contest in 1974 with their song "Waterloo".
Serbia won eurovision song contest 2007 with their song molitva
Finland's representative in Eurovision Song Contest 2011 was Paradise Oskar, aka Axel Ehnström. He performed a song called "Da Da Dam"
Sandie Shaw won the Eurovision Song Contest 1967 for the United Kingdom with the song "Puppet on a string".
Portugal have never won the Eurovision Song Contest, up to and including the 2011 contest.
Azerbaijan
Running Scared by Azerbaijain.
Katrina and the Waves won for the UK in 1997
No, Hungary are yet to win the Eurovision Song contest.
She is a German singer-songwriter who won the eurovision song contest 2010 in Oslo, Norway. She also participated in the eurovision song contest 2011 but did not win
Abba won the Eurovision Song Contest of 1974, which was hosted by Great Britain.
Linda Martin won the Eurovision Song contest in 1992, representing Ireland.
Lena Meyer-Landrut, representing Germany, won the Eurovision Song Contest 2010.
Alexander Rybak won the Eurovision Song Contest 2009 for Norway with 387 points.
Portugal has never won the Eurovision Song Contest
It was in Germany, and Azerbaijan won. I hope that helps, as I do not understand this question!!