While I think that the arc of Kingston's career has yet to be fully developed, we can see some definite elements present. The previous post about Ben E. King is certainly well warranted. The song, "Me Love," is inspired by Led Zeppelin's "D'Yer Maker." On the flip side of the song and released on the UK version, Kingston sang a cover of Marley's "No Woman, No Cry." Being a fusion artist where much is connected to Jamaica, I would say that Marley would be another influence on his music. Another influence on Kingston would be music from the 1980s. On his self titled album, one can find samples of Phil Collins' classic, "In the Air Tonight," as well as a presence of the Ice- T song, "Colors." As previously mentioned, Kingston is taking and pulling from many different influences and styles of music.
Sean Kingston (Kisean Anderson) also had a grandfather who was a very popular producer in Jamaican reggae music so he has a strong family influence regarding his music. He also spend some of his childhood in Jamaica so this has also had a tremendous influence on his music as reggae is very popular there. He has taken his heritage and used it in his music. Like most artists, singers and songwriters often write about experiences that they have had in their lives and put it into song.
Besides the obvious influence of Jamaican music elements upon his songs, Kingston has said in interviews that he loves the style of Motown Oldies from the 50s and 60s. If you listen to "Beautiful Girls" with that in mind, you will hear parts of the melody from Ben E. King's 1961 hit, "Stand by Me."
Kingston was born in Jamaica and raised in Miami; so he certainly presents an interesting blend of styles.