Pop star Justin Timberlake can be found, when he's not performing in front of thousands of screaming fans, on the golf course.   Timberlake has become quite passionate about the game in the last few years and is now taking his love of the environment to the course as well. Timberlake has recently purchased an older golf course and invested around $16 million in making it more eco-friendly. The singer says of this plans, "Originally it...