Sebastian Karlsson may refer to:
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Sebastian Karlsson (singer)
Sebastian Karlsson (born 2 January 1985), known professionally as Sebastian, is a Swedish singer and performer, best known for his participation in Idol 2005, where he came in second place after Agnes Carlsson. He got a radio hit in Sweden with h ...
, Swedish singer
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Sebastian Karlsson (ice hockey), Swedish ice hockey player
{{hndis, Karlsson, Sebastian