Help me find this song
 

I was at a wedding and this song played and I am trying to find it! It was a female vocal, her voice and band had a modern soul/jazz sound. The song she was singing was a cover, a famous love song. I can't remember the words but I know it was a remake of a song I've heard before. I instantly thought it might be Lianne La Havas. But from what I'm searching I haven't found it.

I wanted to find it so bad, I even emailed the DJ and haven't gotten a response ....

Does any body have a guess?

In a Gadda Da Vida - Iron Butterfly