who is the first one?
It is a German band formed in Düsseldorf in 1970 by Ralf Hütter and Florian Schneider.
Kraftwerk
Kraftwerk (, "power station") is a German band formed in Düsseldorf in 1970 by Ralf Hütter and Florian Schneider. 
who sang tik tok and we are who we are Kesha. does it belong to any album? No, its from her extended play (EP), "Cannibal". what does the term  ep refer to? An extended play, often referred to as an EP, is a musical recording that contains more tracks than a single but is usually unqualified as an album or LP. can you name the best selling one of its kind? As Ugly as They Wanna Be. does the singer have other professions as well? UNANSWERABLE what style of music can we see in the above mentioned singer's works? She has a mezzo-soprano voice, and has done country, pop rock, electro and synth-pop. what is her opinion about spirituality? She views "God [as] nature and space and energy and the universe. has she faced any issues legally? Yes, In October 2014, Kesha sued producer Dr. Luke for sexual assault and battery, sexual harassment, gender violence, emotional abuse, and violation of California business practices which had occurred over 10 years working together. are there any albums released by her? Yes, Warrior and Rainbow, to name a few. can you name a few people who are famous in the last mentioned genre? Kraftwerk, Erasure and Pet Shop Boys, to name a few.
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Kraftwerk [SEP] Introduction
Kraftwerk (, "power station") is a German band formed in Düsseldorf in 1970 by Ralf Hütter and Florian Schneider. Widely considered as innovators and pioneers of electronic music, they were among the first successful acts to popularize the genre. The group began as part of West Germany's experimental krautrock scene in the early 1970s before fully embracing electronic instrumentation, including synthesizers, drum machines, and vocoders. On commercially successful albums such as "Autobahn" (1974), "Trans-Europe Express" (1977), "The Man-Machine" (1978), and "Computer World" (1981), Kraftwerk developed a self-described "robot pop" style that combined electronic music with pop melodies, sparse arrangements, and repetitive rhythms, while adopting a stylized image including matching suits.