Riho Sibul Riho Sibul (born 26 June 1958) is an Estonian singer and guitarist of rock band Ultima Thule. External links Review: Riho Sibul (2000) References Category:1958 births Category:Living people Category:Estonian male singers Category:Estonian-language singers Category:Estonian rock guitarists Category:Estonian rock singers Category:20th-century Estonian singers Category:21st-century Estonian singers Category:20th-century Estonian musicians Category:21st-century Estonian musicians Category:20th-century male singers Category:21st-century male singers Category:Recipients of the Order of the White Star, 5th Class