Singer/actor Tyrese Gibson was pushed so hard to lose weight by Will Smith he passed out in his trailer.

The Sweet Lady hitmaker first rose to fame as a model known for his six-pack abs - but admits he let his healthy eating habits go in recent months.

And Gibson insists he was keen to keep packing on the pounds - until Smith reinspired him to get back into shape.

He says, "Life got a little comfortable for me for a quick minute. I got unprioritised and started eating a few things... probably a little over 40 pounds."

"I was training with (Will Smith) on the set of his film Seven Pounds... that was the start of me turning it around. Plus some real powerful conversations. He's intense. Will is intense.

"The times that I passed out in his trailer he was there to help me get on my feet... (I passed out) trying to keep up with him."