New song whoa oh whoa oh oh oh oh?

Okay this is gonna sound really vague but I really liked this song and forgot to write it down. It's been driving me nuts for days. Okay it starts off with whoa oh whoa oh oh oh oh, it sounds like a newer song, definitely something from the 00's. It has two guys singing and they switch off and on during the song, one indie/pop singer with a really pretty voice and the other sort of like a reggae/rap guy who sounds kinda like travie mccoy. I think they were talking about a girl, but I can't really remember. lol. Please hellllpppp.