Selena Gomez Out on the Town After Justin Bieber Arrest -- SMILES FOR MILES

Selena Gomez sought out the paparazzi Thursday night -- gleefully parading into a fancy West Hollywood restaurant on the heels of her ex-boyfriend's arrest.

Selena and dinner date Demi Lovato were grinning ear-to-ear as they were exiting Craig's restaurant ... more than willing to mug for the cameras as they signed autographs for fans.

There's NO doubt ... Selena wanted to be seen, after Justin Bieber and his date Chantel Jeffries were pulled over in Miami Beach earlier in the day and J.B. was popped for DUI and resisting arrest.