Underage hottie Hayden Panettiere, 17, used some of her superhuman powers to woo her 21-year-old "Laguna Beach" boyfriend Stephen Colletti out for a snack n' smooch.

The young Hollywood lovebirds landed at Urth Caffe on Melrose Avenue, and canoodled their way through a lunch on the patio, ignoring photogs and gawking diners.

Ah, young love. *sounds of birdies*