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.
Christopher Anthony Martin, better known to his fans as Chris Martin is a co-founder and talented member of the alternative rock band Coldplay, who not only sings the vocals, but also plays the rhythm guitar, harmonica, keyboards and piano.