We worried that Megan Fox might actually disappear when she turned to the side after spotting these snaps of her looking thinner than ever.
The actress, who is rumoured to be a big fan of fad diets, was supporting husband Brian Austin Green at the event in Long Beach.
But Megan looked so tiny in her cut-off Siwy hotpants that it seemed more fitting for Brian to be supporting her as the pair posed together.
He said: "She gets frustrated at times because she's like 'I need to put on weight.' So she actually weight-trains to keep on that lean muscle tissue.
"Believe it or not she has this really fast metabolism. So her training is all about body toning and sculpting. With her it's really about she’s eating enough of the right things. People thought, 'Oh she must be anorexic,' but she’s far from that!"