A fashionable hair pin having a series of running flash lights which comprises a curved body made of transparent or translucent material and having a channel grooved in an inner sidewall thereof for engaging a bulb belt having a plurality of flash bulbs of different colors controlled by an integrated circuit through a contact switch which is actuated to turn on or turn off the flash bulbs by means of a lip member formed in the curved body and a snap ring adapted to be engaged in the channel and positioned over the belt for holding the belt in place.