I really don't think theres a group or anything that actually sings this song. I believe this a song that has just been on picking up different variations along the way. My church sings it as follows:
The Jesus in me loves the Jesus in you x2
Your Easy................x3
Your Easy to Love
Then we do a lil break and it goes
Loving you, is all I wanna do.............x2
Your Easy..............x3
Your Easy to Love
That's basically it.