So, my girlfriends BB4 keeping blowing tail light bulbs. i don't think the wiring is wrong or shorting, the fuses are fine.. is this a common problem with these cars?

the reverse lights work, the running lights work, but the right breaklight randomly blows and that's the only one.

 

Check the bulb connector to make sure it's tight against the leads. A loose connection can cause arcing which can cause the bulb to blow.

No, this isn't a common problem. If the connector isn't the issue, then it's in the wiring.