The oblique (objective) form you functioned previously in the roles of both accusative and dative, as well as all instances after a preposition.
Chris Martin is lead singer, rhythm guitarist and pianist for the alternative band Coldplay. The group has won multiple Grammy Awards over the years, one being for their debut album.
Queen's lead singer was Freddie Mercury. It has to be noted, though, that Roger Taylor (the drummer) and Brian May (the guitarist) also sang lead vocals on some Queen songs.