John Travolta's Growth Spurt

John Travolta has once again done the impossible and grown a full head of hair in a matter of days!

The follicle-challenged 57-year-old showed off his bald forehead in Calabasas this weekend (left), but just a couple days later the "Battlefield Earth" star was rockin' much longer and darker locks in Burbank on Tuesday (right).

Unbeweaveable.