Question: What schlager singer represented Germany in 1981 at Eurovision?

Context paragraphs:
Chansons pour ceux qui s'aiment: "Chansons pour ceux qui s'aiment" (English translation: "Songs For Those Who Love Each Other") was the Luxembourgish entry in the Eurovision Song Contest 1976, performed in French by German schlager singer Jürgen Marcus.

Germany in the Eurovision Song Contest 2002: Germany was represented at the Eurovision Song Contest 2002 by Corinna May with the song "I Can't Live Without Music", written by Ralph Siegel and Bernd Meinunger.  Germany's representative was chosen during a national final called 'Countdown Grand Prix 2002'.  It was held on February 22 at the Ostseehalle in Kiel, hosted by Axel Bulthaupt and it was broadcast live on television.  The winner was chosen in two rounds of televoting - after the first round, the top 3 songs were voted on again.  Corinna May won the German National Final and represented Germany in Tallinn with her English-language song 'I can't live without music'.  Corinna May had also entered the German National Final in 1999 and 2000.  She had previously won the 1999 German Final before being disqualified when it was discovered that her winning song had already been released by another band.  She also came 2nd in the 2000 German Final.  At Eurovision 2002 Corinna May placed 21st.

Germany in the Eurovision Song Contest 1981: Germany was represented by Lena Valaitis, with the song "Johnny Blue", at the 1981 Eurovision Song Contest, which took place on 4 April in Dublin.  "Johnny Blue" was the winner of the German national final, held on 28 February.  Valaitis had previously taken part in the German final in 1976.

Towa Carson: Towa Carson (actual name Birgit Rose-Marie Anlert, née Carlsson), born on 31 March 1936 in Eskilstuna, Sweden, is a Swedish schlager singer.  She debuted in 1954 and had the most success in the 1950s and 1960s like "De tre klockorna", Swedish version of "The three bells", which peaked at #4, "Spara sista dansen för mig" ("Save the last dance for me"), which also peaked at #4 and her biggest hit "Jag måste ge mig av" (Billy Grammer's "Gotta travel on"), peaked at #3.  She recorded many duets with Lasse Lönndahl, the most successful one was "Visa mig hur man går hem" (Irving King's "Show me the way to go home") peaked at #12.  The Swedish national radiochart Svensktoppen contains 25 "Towa-hits".  She participated in the Swedish song contest Melodifestivalen (which serves as a national preselection for the Eurovision Song Contest) in 1967 ("Du vet var jag finns", third place) and 1968 (two songs: "Alla har glömt" took fourth place, while "Vem frågar vinden" took the fifth).  Unlike many other Scandinavian schlager-singing stars, she never sought international career, despite allegedly receiving offers from the US and West Germany.

Christoff De Bolle: Christoff De Bolle (born in Ninove, Belgium on 18 June 1976), better known by the mononym Christoff is a Belgian Flemish schlager singer.  He is also a radio presenter, and appeared in a number of television series.  Since 2015, he is part of the schlager boyband KLUBBB3, together with Florian Silbereisen and Jan Smit.

Lena Valaitis: Lena Valaitis (born September 7, 1943) is a Lithuanian–German schlager singer.  She had her greatest success during the 1970s and 1980s and competed in three Eurovision Song Contests.

Germany in the Eurovision Song Contest 2006: Germany’s selection for the Eurovision Song Contest 2006 was held on 9 March, with only three performers and songs as part of a special show celebrating 50 years of Eurovision.  Singer/comedian Olli Dittrich with his country/pop band Texas Lightning beat former Modern Talking singer Thomas Anders and 1972 Eurovision winner Vicky Leandros to represent Germany at Eurovision.  They represented Germany with the song "No No Never".  The song was written and composed by Jane Comerford, lead vocalist of the band.

Jürgen Marcus: Jürgen Marcus (born Jürgen Beumer, 6 June 1948 in Herne, North Rhine-Westphalia) is a German schlager singer who was most successful during the 1970s, when he had 14 chart hits in Germany.  He is also known for his participation on behalf of Luxembourg in the 1976 Eurovision Song Contest.

Lena Meyer-Landrut: Lena Johanna Therese Meyer-Landrut (born 23 May 1991), known professionally as Lena (] ), is a German singer-songwriter.  She represented Germany in the Eurovision Song Contest 2010 in Oslo and won the contest with the song "Satellite".  With her three entries from the German national final "Unser Star für Oslo" (Our Star for Oslo), Meyer-Landrut set an all-time chart record in her home country by debuting with three songs in the top five of the German singles chart.  Both "Satellite" and her first album "My Cassette Player" debuted at number one in Germany, while the former has been certified double Platinum since, the album has been certified five times Gold for sales of over 500,000 units.  Meyer-Landrut represented Germany for the second consecutive time in the Eurovision Song Contest at Düsseldorf in 2011 with the song "Taken by a Stranger".

Peter Orloff: Peter Orloff (March 12, 1944, Lemgo) is a German schlager singer, composer, producer, and songwriter.  He had more than a dozen hit singles in West Germany in the 1960s and 1970s.

Supporting paragraphs: Germany in the Eurovision Song Contest 1981 Lena Valaitis
Answer: Lena Valaitis