Who sings a song that talks about one love one time?

Are you referring to the song in the Jamaica commercials? One Love, One life, Lets get together and feel alright. ? That's Bob Marley One Love/ People Get Ready.

Well, there is a bob Marley song about that, but there is one called one time by Justin Bieber, sample: "Girl u my one love my one heart, my one life fo sho, lemme tell you one time (girl i luv, girl i luv u) imma tell u one time (girl i love, girl i love you)"

Hope that helped :)

Yeah one time by Justin Bieber is who u r talking about i think. It goes... Girl u my one luv, my one heart, my one life for sure lemme tell ya one time (girl i luv, girl i luv u) imaa tell ya one time ( girl i luv, girl i luv u) Shawty right there she got everthing i need and imma tell her one time... give her everthing u need.. down to my last dime.. she makes me happy i know where I'll be right by ur side cause she is the one for me!!

Hope that gave ya a clue :)

Yeah that helped thank u guys!